Showing newest 17 of 20 posts from 11/1/09. Show older posts
Showing newest 17 of 20 posts from 11/1/09. Show older posts

Monday, November 30, 2009

Año Nuevo

After fifty years fighting off budget cuts and development, a California state park is a shining example of wildlife protection

A little over fifty miles south of San Francisco, there is a place where threatened sea otters and elephant seals (pictured) have been saved from extinction.

It is a state reserve called Año Nuevo ("New Year"), created in 1958 by California as a refuge for elephant seals.

"Like so many of California’s state parks, it narrowly averted being closed during the ongoing state budget crisis...overburdened by development plans and surrounded by farms growing row-crops heavy on pesticide -- brussels sprouts mostly," writes Verlyn Klinkenborg in the New York Times.

"The protections are by no means complete," Klinkenborg writes. "But it’s hard to imagine a more vivid demonstration of the value of coastal protection and the ways in which it can be done."

GET INVOLVED

  • Adopt Megan, a female northern elephant seal pup was found starving on a beach in San Luis Obispo County
  • Visit the Marine Mammal Center blog
  • Sign the Universal Declaration of Animal Rights
RELATED POSTS
image: Megan the northern elephant seal pup (Marine Mammal Center)

Friday, November 27, 2009

Fur Free Friday

Over 50 million animals are killed each year for their fur

Rabbits, foxes, chinchillas, seals, mink, ermines, coyotes, sable, otters, beavers, possum, raccoons, dogs and cats. All these animals are killed for their fur. Only the fur of three of them -- dogs, cats and seals -- are banned for sale in the United States.

But for thousands of activists participating in the over 100 anti-fur demonstrations around the world today as part of Fur Free Friday, all fur should be banned.

The global event, led by In Defense of Animals (IDA) and the International Anti-Fur Coalition, is hoping to raise awareness about the horrors of the fur industry.

According to IDA, "Over 50 million animals are mercilessly killed and skinned every year to make fur products. The victims of such violence are either raised in filthy, tiny wire cages for their entire miserable lives before being anally electrocuted or bludgeoned to death, or they are trapped in hideously cruel leg-holds and snares in the wild. Killing animals for their fur by any means or method is horrific and morally unacceptable."

GET INVOLVED

  • Sign a PETA letter to Yohji Yamamoto asking him to stop using fur in his designs
  • Sign an IDA letter urging American lawmakers to support and co-sponsor "Truth in Fur Labeling" legislation H.R. 891/S. 3610
  • Help end the sale of fur at Nordstrom's
  • Take action by writing letters to editors or companies that sell fur (FurKills.org)
RELATED POSTS
image: In Defense of Animals

Wednesday, November 25, 2009

Obama Is Going to Copenhagen

White House says Obama will attend the U.N. climate conference

In a surprising turn, President Obama has decided to go to the United Nations Climate Change Conference taking place in Copenhagen from December 7 through December 18.

He will join at leaders from at least 65 countries, including UK prime minister Gordon Brown, French president Nicolas Sarkozy and Australian prime minister Kevin Rudd.

"Mr. Obama had been under considerable pressure from other world leaders and environmental advocates to make the trip as a statement of American commitment to the climate change negotiations," according to the New York Times.

"The talks, involving more than 190 nations, are expected to produce a wide-ranging interim political declaration but stop short of proposing a binding international treaty."

Delegates are expected to complete the treaty next year.

According to the White House, Mr. Obama will commit to a reduction in greenhouse gas emissions "in the range of 17 percent below 2005 levels by 2020."

The Met Office, the United Kingdom's national weather service, released a new study in September that predicted a global average temperature by 4°C (7.2°F) by 2060, which will result in a rapid drying of Africa, an accelerated melting of the Arctic and extreme flooding in India -- all wreaking havoc on human society as well as hundreds of thousands of species around the world.

"Four degrees of warming, averaged over the globe, translates into even greater warming in many regions, along with major changes in rainfall," said Dr. Richard Betts, Head of Climate Impacts at the Met Office Hadley Centre.

"Together these impacts will have very large consequences for food security, water availability and health," Dr. Betts said.

Mr. Obama will speak at the conference on December 9, a day before he receives his Nobel Peace Prize in Oslo.

"We are pleased that President Obama will be in Copenhagen during the early part of the climate summit," said Keya Chatterjee, director the World Wildlife Fund’s climate program.

"It's important that his words during this important moment convey that the United States intends to make climate change a legislative priority, not simply a rhetorical one."

GET INVOLVED

  • Sign a Rainforest Action Network letter urging President Obama to push for a strong climate deal in Copenhagen
  • Subscribe to the United Nations Climate Change Conference newsletter
  • Contact your senators and ask them to sign climate change legislation (U.S. residents)
  • Sign the "We Can Solve It" petition for a global treaty on climate change
  • Join the Greenpeace "Energy [R]evolution"
  • Analyze and reduce your impact on the environment with the National Grid Floe
RELATED POSTS
image: U.S. Senate Office of Barack Obama

Tuesday, November 24, 2009

No More Lox for Bears

A salmon collapse is dangerous for grizzlies

There's a lot of protein in salmon, but that's not what grizzly bears are looking for.

They are looking for the fat in the fish, which will help the bears survive their long winter hibernation.

This spawning season, an estimated 10.4 million sockeye salmon were expected to return to the Fraser River, British Columbia's longest river.

But, according to The Economist, only 1.7 million made the journey -- a shocking 50-year low.

Scientists and environmentalists agree to the dual cause of this precipitous collapse: overfishing and the destruction of spawning ecosystems.

There is also some debate as to the detrimental effects of fish farming, which can release diseased farm fish into the open water, infected their wild brethren.

With the salmon decline, there is another cycle at risk. Bears will not be distributing as many nitrogen-rich fish carcasses throughout their habitats, lessening the fertilizing effect that the forests need to thrive.

GET INFORMED

  • Watch an International Fund for Animal Welfare (IFAW) video of orphaned bear cubs
GET INVOLVED
  • Sign an Alaska Wilderness League letter urging Secretary Salazar to protect the sockeye salmon stocks in Bristol Bay by not signing the plan to open up the area to destructive gold and copper mining
  • Sign a National Wildlife Federation letter urging the Obama administration to restore wild salmon and steelhead to healthy fishable populations that create jobs, keep communities prosperous and promote a clean energy economy
  • Download the Environmental Defense Fund's "Pocket Eco-Friendly Fish Selector" to make choices that help prevent overfishing
RELATED POSTS
image: Dr.DeNo

Monday, November 23, 2009

Playing God

One of the building blocks of life has been reproduced in a lab

Bovine spleen. Herring sperm. Wheat germ.

These were places, in 1900, that contained the yeast from which uracil was first isolated and discovered.

A component of RNA, uracil is a main element of our genetic material.

And now, for the first time, this crucial building block of life (at least as we know it) has been reproduced in a laboratory, according to a recent ScienceDaily.com article.

How did they do it? Under "space-like conditions," scientists from NASA took a piece of ice that contained pyrimidine, a compound containing nitrogen and hydrogen found in meteorites, and exposed it to ultraviolet radiation -- et voila! -- uracil.

"We are showing that these laboratory processes, which simulate occurrences in outer space, can make a fundamental building block used by living organisms on Earth," said Michel Nuevo, research scientist at NASA's Ames Research Center in California.

"Nobody really understands how life got started on Earth, said Scott Sandford, a space science researcher at Ames.

"Our experiments demonstrate that once the Earth formed, many of the building blocks of life were likely present from the beginning. Since we are simulating universal astrophysical conditions, the same is likely wherever planets are formed."

GET INVOLVED

  • Sign a petition to add the option for US taxpayers to contribute to NASA on the IRS 1040 tax form
  • Download BOINC, the SETI@home program that allows your idle computer to add its computing power to help analyze data in SETI's hunt for extraterrestrial life
  • Support Conservation International campaigns to protect biodiversity hotspots around the world
RELATED POSTS
image: Stefanie Milam, Michel Nuevo and Scott Sandford (credit: Dominic Hart/NASA)

Friday, November 20, 2009

Patrick Martins: About a Bird

Thinking before thanking

[Editor's note: On November 24, 2003, the New York Times published the following editorial by Patrick Martins. It has since become a "modern Thanksgiving classic."]

About a Bird
By Patrick Martins
November 23, 2003

When you sit down to your Thanksgiving meal on Thursday, waiting for the main attraction to be brought in on a platter, take a moment to think about where it came from and how it found its way to your table. After all, your turkey is not the same wily, energetic, tasty bird that struck our ancestors as the perfect centerpiece for an American holiday.

Most Americans know that the turkey is a native game bird, and that Benjamin Franklin thought it would have been a better national symbol than the bald eagle. For good reason: in the wild, Meleagris gallopavo is a fast runner and a notoriously difficult prize for hunters. Even after they were domesticated, turkeys remained spirited, traditionally spending the bulk of their lives outdoors, exploring, climbing trees, socializing and, of course, breeding.

Now consider the bird that will soon be on your plate. It probably hatched in an incubator on a huge farm, most likely in the Midwest or the South. Its life went downhill from there. A few days after hatching -- in the first of many unnatural if not necessarily painful indignities -- it had its upper beak and toenails snipped off. A turkey is normally a very discriminating eater (left to its own devices, it will search out the exact food it wants to eat). In order to fatten it up quickly, farmers clip the beak, transforming it into a kind of shovel. With its altered beak, it can no longer pick and choose what it will eat. Instead, it will do nothing but gorge on the highly fortified corn-based mash that it is offered, even though that is far removed from the varied diet of insects, grass and seeds turkeys prefer. And the toenails? They're removed so that they won't do harm later on: in the crowded conditions of industrial production, mature turkeys are prone to picking at the feathers of their neighbors -- and even cannibalizing them.

After their beaks are clipped, mass- produced turkeys spend the first three weeks of their lives confined with hundreds of other birds in what is known as a brooder, a heated room where they are kept warm, dry and safe from disease and predators. The next rite of passage comes in the fourth week, when turkeys reach puberty and grow feathers. For centuries, it was at this point that a domesticated turkey would move outdoors for the rest of its life.

But with the arrival of factory turkey farming in the 1960's, all that changed. Factory-farm turkeys don't even see the outdoors. Instead, as many as 10,000 turkeys that hatched at the same time are herded from brooders into a giant barn. These barns generally are windowless, but are illuminated by bright lights 24 hours a day, keeping the turkeys awake and eating.

These turkey are destined to spend their lives not on grass but on wood shavings, laid down to absorb the overwhelming amount of waste that the flock produces. Still, the ammonia fumes rising from the floor are enough to burn the eyes, even at those operations where the top level of the shavings is occasionally scraped away during the flock's time in the barn.

Not only do these turkeys have no room to move around in the barn, they don't have any way to indulge their instinct to roost (clutching onto something with their claws when they sleep). Instead, the turkeys are forced to rest in an unnatural position -- analogous to what sleeping sitting up is for humans.

Not only are the turkeys in the barn all the same age, they -- and the roughly 270 million turkeys raised on factory farms each year -- are all the same variety, the appropriately named Broad Breasted White. Every bit of natural instinct and intelligence has been bred out of these turkeys, so much so that they are famously stupid (to the point where farmers joke they'll drown themselves by looking up at the rain). Broad Breasted Whites have been developed for a single trait at the expense of all others: producing disproportionately large amounts of white meat in as little time as possible.

Industrial turkeys pay a high price for the desire of producers and consumers for lots of white breast meat. By their eighth week, these turkeys are severely overweight. Their breasts are so large that they are unable to walk or even have sex. (All industrial turkeys today are the product of artificial insemination.)

Needless to say, no Broad Breasted White could hope to survive in nature. These turkeys' immune systems are weak from the start, and to prevent even the mildest pathogen from killing them, farmers add large amounts of antibiotics to their feed. The antibiotics also help the turkeys grow faster and prevent ailments like diabetes, respiratory problems, heart disease and joint pains that result from an unvaried diet and lack of exercise. Because the health of these turkeys is so delicate, the few humans who come in contact with them generally wear masks for fear of infecting them.

On non-industrial farms, it takes turkeys 24 weeks to arrive at slaughter weight, about 15 pounds for a hen and 24 pounds for a tom. Industrial turkeys, however, need half that time. By 12 to 14 weeks, the whole flock is ready for the slaughterhouse. Once slaughtered, the turkeys have to suffer one more indignity before arriving in your grocer's meat case. Because of their monotonous diet, their flesh is so bland that processors inject them with saline solution and vegetable oils, improving "mouthfeel" while at the same time increasing shelf life and adding weight.

Anyone who cooks knows that salt alone won't do the trick. Once, simply sticking a turkey in the oven for a few hours was enough. Today, chefs have to go to heroic lengths to try to counteract the turkey's cracker-like dryness and lack of flavor. Cooks must brine, marinate, deep fry, and hide the taste with maple syrup, herbs, spices, butter and olive oil. It's no surprise that side dishes have moved to the center of the Thanksgiving menu.

Even so, 45 million turkeys will be sold this Thanksgiving, so turkey producers aren't doing badly for themselves. But could they be sowing the seeds of their own misfortune? By relying solely on a single strain of the Broad Breasted White, and producing it in huge vertically integrated companies that control every aspect of production, entire flocks and even the species itself is one novel pathogen away from being wiped off the American dinner table. The future of the turkey as we know it rests on only one genetic strain. And the fewer genetic strains of an animal that exist, the less chance that the genes necessary to resist a lethal pathogen are present.

It's for this reason that maintaining genetic diversity within any species is crucial to a secure and sustainable food supply. Sadly for the turkey and for us, the rise of the Broad Breasted White means that dozens of other turkey varieties, including the Bourbon Red, Narragansett and Jersey Buff, have been pushed to the brink of extinction because there is no longer a market for them.

What to do? One solution is to bypass Broad Breasted Whites altogether. A few nonprofit groups -- including my own, Slow Food U.S.A., and the American Livestock Breeds Conservancy -- are working with independent family farms to ensure that a handful of older, pre-industrial turkey varieties, known as heritage breeds, are still being grown. These varieties are slowly gaining recognition for their dark, rich and succulent meat. (My group, which encourages the preservation of artisanal foods, sells turkeys on behalf of these farmers, but we don't profit from the transactions.)

While it might be too late to get your hands on a heritage bird this year, there are some other options available to consumers who would like a turkey raised in a more humane fashion, even if it is a Broad Breasted White. Farmers' markets often have meat purveyors who raise their turkeys the way they should be, free ranging and outdoors.

At the market, you can often meet the person who grew your turkey and ask about how it was raised. Many independent butcher shops have developed relationships with local farmers who deliver fresh turkeys, especially for special occasions like Thanksgiving. A few environmentally conscious supermarkets get their turkeys from small family farms.

But as you shop, you need to look for more than just labels like "organic," "free range" and "naturally raised." They have been co-opted by big business and are no guarantee of a healthier and more humanely raised bird.

The key word to keep in mind is "traceability." If the person behind the counter where you buy your turkey can name the farm or farmer who raised it, you are taking a step in the right direction. You'll help give turkeys a better life. You'll be kinder to the environment. And you might even wind up with a turkey that tastes, well, like a turkey.

GET INVOLVED

  • Serve a delicious, cruelty-free vegetarian Thanksgiving that will not disappoint your guests
  • Join the Farm Sanctuary Advocacy Campaign Team
image: white female turkey (credit: Scott Bauer, USDA)

Thursday, November 19, 2009

Exit Koala

Scientists fear that the koala may be wiped out in 30 years

A vegetarian marsupial native to Australia, the koala is a main contender for the world's cutest animal.

But a variety of factors are pushing this furry and docile animal towards extinction. A recent survey by the Australian Koala Foundation has found that its numbers have halved in the past six years.

Previous population estimates were around 100,00o individuals -- today that number is 43,000.

It has been dealing with habitat loss from human development. In particular, the growth of tourism has forced the koala out of its home.

"Out-of-control population growth in southeast Queensland has allowed urban sprawl to reduce what was Australia's largest remaining koala colony between Brisbane and the Gold Coast from about 7000 animals a decade ago to possibly fewer than 2000," writes Brian Williams in Brisbane's Courier Mail.

Deforestation is also a huge concern, as koalas live entirely in trees.

"The koalas are missing everywhere we look," Foundation chief Deborah Tabart told the BBC. "It's really no tree, no me. If you keep cutting down trees you don't have any koalas."

Now, Australia's iconic tree-dweller is being further pushed into extinction by the rise of an AIDS-like retrovirus.

First discovered in 2000, the deadly retrovirus "infects and alters the animal's DNA, has been linked to a variety of diseases and medical problems, including leukemia, bone marrow failure, cancer and AIDS-like immune deficiencies," according to a recent Scientific American article.

The government is expected to list the animal as vulnerable to extinction.

Like the greater glider and ringtail possum, the koala can survive on a diet of eucalyptus leaves.

But at the moment, it needs a lot more than yummy leaves and an official "vulnerable" designation. It needs funding for research to stop the spread of the retrovirus.

"Twenty-two million dollars has been committed by government to manage the contagious cancer affecting Tasmanian devils," said Dr. John Hanger, a koala research pioneer and the first person to isolate and genetically sequence the retrovirus infection, according to the Courier Mail.

"The koala disease epidemic is just as devastating but we know little about it."

GET INVOLVED

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image: baby koala, Currumbin Wildlife Sanctuary (credit: Erik Veland)

Wednesday, November 18, 2009

Pebble Mine

Plans for the world's largest open pit mine threaten to scarify a pristine part of America's public land

Alaska's Bristol Bay contains the world's largest sockeye salmon fishery, and is famed for iconic runs of chum salmon, silver salmon and king salmon.

But now, after being untouched for over three decades, a Bureau of Land Management (BLM) plan developed by the Bush administration threatens to destroy this thriving and important ecosystem.

The plan, which awaits approval from Secretary of the Interior Ken Salazar, will open up 98% of its waters and 100% of its rivers to devastating hard rock mining.

If completed, the highly controversial Pebble Mine will be the world's largest open pit mine. It will no doubt mutilate the natural landscape and decimate wild animal habitats throughout Bristol Bay in the search for precious metals such as copper and gold.

Pebble Mine would require the creation of many miles of roads and bridges in an area that is currently wild.

The waste material created by the mine would be stored in two huge artificial lakes behind massive dams, one of which will be over four miles long.

The bay is "a world-class natural gem and worthy of our reverence and protection," said Cindy Shogan, the Executive Director of the Alaska Wilderness League, in a recent public statement.

"BLM's plan will create a development rush in Bristol Bay that will surely be disastrous," said Shogan, "carving a potentially massive mining district out of what is currently roadless wilderness and even opening the door for more oil drilling."

GET INVOLVED

  • Sign an Alaska Wilderness League letter urging Secretary Salazar to not sign the plan and protect public lands from destructive mining
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image: echoforsberg

Tuesday, November 17, 2009

Slipping Away: The Polar Bear

The polar bear has received habitat protection from America, but that won't matter if global warming melts that habitat away

The Arctic, said David Schneider of the University Corporation for Atmospheric Research (UCAR), "perhaps more than any other region on Earth, is facing dramatic impacts from climate change."

He said that in a press release issued in September about a recent National Science Foundation-affiliated study he co-authored that found that "arctic temperatures in the 1990s reached their warmest level of any decade in at least 2,000 years."

And one of the Arctic's standard-bearers is getting hit particularly hard: the polar bear.

On November 10, the Olympic torch, on its journey through Canada, passed through Churchill, Manitoba, known as "the polar bear capital of the world."

Scientists took advantage of the moment to make a presentation about the plight of Ursus maritimus to visiting international government and corporate leaders, according to a Canadian Press story.

Robert Buchanan, president of Polar Bears International, said that while almost three-quarters of the world's polar bears reside in Canada, Canadians seem generally unmoved by the grave situation facing them.

"I don't think they realize how they're on the verge of losing their icon," said Buchanan, noting the quick measures taken by American lawmakers when they found out the eagle was endangered.

America is moving on the issue. Slowly.

On October 22, after a partial settlement in a lawsuit brought by the Center for Biological Diversity, the Natural Resources Defense Council (NRDC), and Greenpeace, the U.S. Fish and Wildlife Service (FWS) proposed to designate more than 128 million acres (200,541 square miles) of land and water along Alaska's northern coast as "critical habitat" for the polar bear.

It's a welcome move, but designating an area doesn't address the main issue: Anthropogenic global warming is melting the Arctic.

Legally protected or not, a ravaged ecosystem won't help the polar bear or other species struggling with habitat loss.

"Designating polar bear critical habitat is a good first step toward protecting this species," said Melanie Duchin, a Greenpeace campaigner in Anchorage, Alaska, according to a CBD press release. "However, as long as the secretary of the interior [Ken Salazar] maintains that he can do nothing about greenhouse emissions and global warming, protections for the polar bear will ultimately be ineffective."

The period for public comment ends on December 28. The Sierra Club is collecting comments and will deliver them to the FWS.

Buchanan said that we are "killing polar bears from the comfort of our armchairs" and could be taking more measures to save them.

GET INVOLVED

  • Sign the Sierra Club public comment petition that they will deliver to the U.S. Fish and Wildlife Service (FWS)
  • Adopt a polar bear from the Defenders of Wildlife
  • Sign the Polar Bear Central petition to curb global warming
  • Analyze and reduce your impact on the environment with the National Grid Floe
RELATED POSTS
credit: Polar Bear mother and cub, Liefdefjord, Svalbard, by Michael Haferkamp, July 2002

Monday, November 16, 2009

The Leonids

A famous comet sheds debris through our sky

The German Wilhelm Tempel and the American Horace Parnell Tuttle were astronomers and famous comet hunters.

On January 6, 1866, they independently discovered one that almost exactly intersects Earth's orbit, though it takes 33 years for it to make one revolution around the Sun.

It is Comet 55p -- commonly known as Comet Tempel-Tuttle -- and it is the parent body of the Leonids, a meteor shower that gets its name from its origin in the constellation Leo.

The Leonids provided a mythical show in 1833, with some accounts noting over a hundred thousand meteors streaming through the sky.

This year's, the Leonids peak on November 17 and promise to offer what Space.com predicts will be a "better-than-average display."

It might not be the extraordinary fireworks of 1833, but it will still be a powerful sight in the night sky -- and a reminder that Spaceship Earth occupies just one of the countless paths etched out around the Sun.

GET INVOLVED

  • Find out when and where to look for the Leonids
  • Calculate the number of meteors visible in your observation area using NASA's Fluxtimator
  • Download this month's free night sky map and calendar from Skymaps.com
RELATED POSTS
image: The most famous depiction of the 1833 meteor storm actually produced in 1889 for the Adventist book Bible Readings for the Home Circle based on a first-person account of the 1833 storm by a minister, Joseph Harvey Waggoner on his way from Florida to New Orleans. (credit: Adolf Vollmy)

Friday, November 13, 2009

Sailing Through Space on Sunshine

The future of space exploration may be solar-powered craft

By the end of 2010, a rocket about 500 miles above the Earth will open up and a shiny little box will emerge.

Light photons from the Sun will hit its mirror-like aluminized sail made out of Mylar.

As the photons hit, their momentum will be transferred to the box, which will begin its journey around Earth, all without the use of rocket fuel -- just sunshine.

Called Lightsail, this small box is the first "solar-sail spacecraft."

It is the project of the Planetary Society, co-founded in 1980 by the American astronomer and popular author Carl Sagan.

According to their Web site, Lightsail "will demonstrate that sunlight can propel a spacecraft in Earth orbit. LightSail 2 and 3, more ambitious still, will reach farther into space."

"In principle, a solar sail can do anything a regular sail can do, like tacking," writes Dennis Overbye in a New York Times story about Lightsail.

"Unlike other spacecraft, it can act as an antigravity machine, using solar pressure to balance the Sun’s gravity and thus hover anyplace in space.

According to Overbye, Sagan's widow Ann Druyan "has been chief fund-raiser for the society’s sailing projects [and] called the space sail 'a Taj Mahal' for Sagan, who loved the notion and had embraced it as a symbol for the wise use of technology."

"Over days and years a big enough sail, say a mile on a side," writes Overbye, "could reach speeds of hundreds of thousands of miles an hour, fast enough to traverse the solar system in 5 years."

GET INVOLVED

  • Support the Planetary Society
  • Support the WCN Solar Project in their effort to provide solar electricity to conservationists in the field
  • View the World Sunlight Map to see where the Sun in shining on the Earth right now
  • Find out how to use solar power at home
  • Participate in the International Year of Astronomy 2009
RELATED POSTS
image: Planetary Society

Thursday, November 12, 2009

Nazca Redux

Cutting down a mythical tree, the people of Peru taunt history to repeat

Almost 2,000 years ago, in the green river valleys along the southern coast of Peru, the Nazca people thrived.

They are probably most known for creating impressive geoglyphs known as the Nazca Lines -- hundreds of individual images of fish, spiders, monkeys and other animals composed of shallow lines drawn in the ground, the largest of which is over 660 feet (200 meters) across.

But between 500 and 700 AD, the Nazca culture collapsed.

According to a new study led by Dr. David Beresford-Jones from the McDonald Institute for Archaeological Research at Cambridge University and the Museo Regional de Ica, one of the main reasons for their catastrophic demise was the deforestation of the huarango tree.

A giant species of mesquite tree common to the American Southwest, the huarango (Prosopis pallida) is prized for its ability to burn long as well as its teak-like durability. Its pods can be used to make flour, molasses and beer. Low and wide, it has been an important source of shade for people and animals over the centuries.

And it is very resilient. With roots that are longer than those of most other trees, the huarango can locate deep sources of groundwater. It also has the ability to capture water mist carried by the wind from the ocean. It can live for more than 1,000 years.

For the Nazca, the widespread clearing of this amazing tree led to flooding, erosion and desertification following an El Niño-Southern Oscillation (ENSO) event, a periodic atmospheric and oceanic change in tropical Pacific region every three to eight years that creates weather disturbances around the world, the cause of which is not completely known.

"In the absence of huarango cover, when El Niño did strike, the river down-cut into its floodplain, Nasca irrigation systems were damaged and the area became unworkable for agriculture," according to the Cambridge University press release about the study.

Today, Peruvians may be tempting history to repeat. Villagers in the Ica region of southern Peru are threatening the survival of this ancient tree, cutting it down for firewood and charcoal, according to a recent New York Times story by Simon Romero.

"It takes centuries for the huarango to be of substantial size, and only a few hours to fell it with a chainsaw,” Mr. Beresford-Jones said in the New York Times article. "The tragedy is that this remnant is being chain-sawed by charcoal burners as we speak."

GET INVOLVED

  • Support Trees for the Future, a non-profit organization that has been helping communities around the world plant trees
  • Download the Greenpeace Tissue Guide so you can purchase tissue and toilet paper that is manufactured from recycled paper -- not old growth forests
RELATED POSTS
image: Huarango tree (credit: PDH, Wikimedia Commons)

Wednesday, November 11, 2009

American Lawmakers Consider Geoengineering

The "silver bullet" for stopping global warming may lie in manipulating Earth's climate

Carbon sequestration. Ocean iron fertilization. Solar radiation management. Cloud reflectivity enhancement.

These geoengineering techniques all have a single aim -- to combat the effects of anthropogenic global warming caused by the emission of greenhouse gases into the atmosphere.

Controlling the planet's climate has long been the purview of science fiction, but it is fast becoming a reality.

On November 5, 2009, the United States House of Representatives Committee on Science and Technology listened to experts in the field at a hearing entitled "Geoengineering: Assessing the Implications of Large-Scale Climate Intervention."

In his testimony, scientist Ken Caldeira of Stanford University's Carnegie Institution for Science Department of Global Ecology compared geoengineering techniques to car seatbelts.

"Just because we wear seatbelts, that does not mean we will drive more recklessly," he said. "Seat belts can remind us that driving is a dangerous activity."

"We need the research now to establish whether such approaches can do more good than harm,” said Caldeira. "This research will take time. We cannot wait to ready such systems until an emergency is upon us."

GET INVOLVED

  • Sign the "We Can Solve It" petition for a global treaty on climate change
  • Analyze and reduce your impact on the environment with the National Grid Floe
RELATED POSTS
image: Removing trees from snow-capped mountains -- such as the Feldberg Mountain in Germany's Black Forest -- helps to reflect more sunlight back into space (credit: Thomas Meier)

Tuesday, November 10, 2009

The Rime of the Modern Mariner

Killing birds to the brink of extinction is yet another sad by-product of commercial longline fishing

If someone has -- metaphorically speaking -- "an albatross around their neck," it means that they have some obstacle to overcome.

The metaphor comes from The Rime of the Ancient Mariner, the famous long poem written in 1797 by Samuel Taylor Coleridge, and it refers to the punishment given to the sailor who killed an albatross, that was considered to be a "bird of good omen."

Today, this mythic seabird is in danger of going extinct due to destructive fishing methods that are used to satisfy the huge, global appetite for tuna and swordfish.

According to a new study conducted by the UK-based Royal Society for the Protection of Birds (RSPB), "In tuna and swordfish fisheries, albatrosses and other seabirds die on the end of longline hooks in unsustainable numbers and, for many species, this is their greatest extinction threat."

Out of the 37 species of seabirds at risk for extinction due to longline fishing, 16 are albatrosses.

"The populations of albatrosses are declining faster in the South Atlantic than any other ocean," said Dr. Cleo Small, an albatross expert working with the RSPB and BirdLife International.

"For example, the wandering albatross – possessing the largest wingspan of any bird – is rapidly declining on South Georgia, and links have been made between these declining populations and longline fishing within the ICCAT fishery. This situation is needless, because the technology exists to prevent these deaths."

Longline fishing is also to blame for the deaths of endangered loggerhead sea turtles.

The albatross first appeared about 70 million years before Homo sapiens. But now, in just a few decades, the human hunger for fish may wipe them out completely.

It seems that two centuries after Coleridge penned his famous verse, fish consumption -- and the bad fishing practices that it entails -- has become an albatross around mankind's hungry, collective neck.

GET INVOLVED

  • Support the RSPB's efforts to save the albatross from extinction
  • Sign a WildAid petition to prevent longline fishing in the Galapagos
  • Take the Sea Turtle Restoration Project Seafood Pledge
  • Download the Environmental Defense Fund's "Pocket Eco-Friendly Fish Selector" to make choices that help prevent overfishing
  • Analyze and reduce your impact on the environment with the National Grid Floe
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image: "Albatroz," woodcut from the journal "O Panorama" 1837 edition (From the Dr. Nuno Carvalho de Sousa Private Collections - Lisbon)

Monday, November 9, 2009

Twenty-Six Ounces of Oil (And the Flesh from Several Cows)

Michael Pollan wonders if the fast food burger is part of a sustainable system

On October 15, Michael Pollan, the award-winning author of Omnivore's Dilemma, spoke at a panel discussion at California Polytechnic State University in San Luis Obispo.

He brought a hamburger from McDonald's with him to help articulate the idea of sustainability.

Specifically, it was a double quarter-pounder with cheese.

"So sustainability is really -- it's an ideal, said Pollan. "There are sustainable systems. A forest. A prairie. I mean, these are sustainable systems; they can go on year after year. They don't need inputs. They don't destroy the conditions on which they depend. But as soon as we get involved and start changing things to feed ourselves, we get into more complicated relationships."

"Now the question is, 'is the system we have sustainable today?'"

"It takes a lot of oil to make a modern fast food hamburger," he said. "An astonishing amount of oil. And I did a little research to find out just how much went into this. The oil comes in in several different stages. There is the biggest part, probably: the petroleum needed to create the fertilizer to grow the corn, which is the diet, typically, of these animals. But there's also the moving of that corn, the moving of the burger, the processing, you know, and getting it to a McDonald's near you.

"So oil. Twenty-six (ounces). That's a lot of oil to make the burger! And you have to ask yourself: Is the system that produces that burger sustainable?"

GET INVOLVED

  • Read the transcript of the panel discussion
  • Find out how green your diet is with the Eating Green Calculator
  • Sign the MakeOurFoodSafe.org petition urging the US Congress to pass strong food safety legislation (US citizens only)
  • Download the Environmental Defense Fund's "Pocket Eco-Friendly Fish Selector" to make choices that help prevent overfishing
  • Analyze and reduce your impact on the environment with the National Grid Floe
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image: CookieM

Friday, November 6, 2009

The Lost Siblings of the Sun

Many scientists now believe that the Sun is not an only child

Our Sun is a lonely star.

The next nearest star to the Sun is Proxima Centauri, about 4.2 light-years away, or 25 quadrillion miles. It would take our fastest space probes over 200,000 years to reach it.

But about one in ten stars are born as a part of a clusters of hundreds to tens of thousands of stars.

And there is growing evidence that our Sun was born as a part of such a cluster, one of about 1,000 other stars, according to a recent Scientific American article by Simon F. Portegies Zwart.

"Had we been around at the dawn of the solar system, space would not have seemed nearly so empty," writes Zwart. "The night sky would have been filled with bright stars, several at least as bright as the full moon. Some would have been visible even by day. Looking up would have hurt our eyes."

So where are the Sun's siblings?

"Although they have scattered and mixed in with millions of unrelated stars, they should be identifiable with the European Space Agency’s Global Astrometric Interferometer for Astrophysics (GAIA) satellite, scheduled for launch in 2011," writes Zwart. "Their orbits and sunlike compositions should give them away."

"Reuniting with our long-lost stellar siblings should enable astronomers to reconstruct the conditions under which a shapeless cloud of gas and dust gave rise to our solar system."

GET INVOLVED

  • Support the WCN Solar Project in their effort to provide solar electricity to conservationists in the field
  • View the World Sunlight Map to see where the Sun in shining on the Earth right now
  • Find out how to use solar power at home
  • Participate in the International Year of Astronomy 2009
  • Sign a petition to add the option for US taxpayers to contribute to NASA on the IRS 1040 tax form
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image: Ron Miller

Thursday, November 5, 2009

We Didn't Start the Fire

Trees encourage wildfires to protect their habitat

Conventional wisdom says fire is bad for trees. But according to a new study published in the December 2009 issue of the journal The American Naturalist, that is not always the case.

Some trees actually play a part in starting wildfires in order to engineer their own environment, increasing their abundance while keeping competitors out of their ecosystems.

"The research proposes a scenario for the development of savannas in landscapes that would otherwise become closed forests," according to a press release issued by the National Institute for Mathematical and Biological Synthesis.

"Examples of savanna trees that facilitate frequent low-intensity fires include the longleaf pine and the south Florida slash pine, both of which frequently shed their needles, providing fodder for wildfires. The savanna tree initially invades grassland, but by facilitating frequent fires, it limits its own density and thus prevents conversion to a forest."

GET INVOLVED

  • Support Trees for the Future, a non-profit organization that has been helping communities around the world plant trees
  • Download the Greenpeace Tissue Guide so you can purchase tissue and toilet paper that is manufactured from recycled paper -- not old growth forests
RELATED POSTS
image: Longleaf pine needles from a 30m specimen near Tallahassee, Florida (credit: Rasbak)