Environment

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**FILE** Leacroft Green places a package to the correct shipping area at an Amazon.com fulfillment center in Goodyear, Ariz., on Nov. 11, 2010. (Associated Press)

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Members of the fire service fill tanks with water as people line up with empty bottles to collect water, as tens of thousands of homes and businesses are affected by severe water shortages caused by broken pipes, outside Avoniel leisure center in east Belfast, Northern Ireland, Wednesday, Dec. 29, 2010. (AP Photo/PA, Paul Faith)

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FILE - In this Oct. 8, 2010 file photo, people walk amongst trees shedding their leaves and changing to seasonal autumnal colors at the Royal Botanic Gardens, Kew, in London. U.S. and British scientists have drawn up a list of all the world's known land plants - a 300,000-species strong compendium which they say will boost conservation and help regulate trade and medicine. (AP Photo/Matt Dunham, File)

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An Iraqi policeman stands guard while hundreds of vehicles line up to be searched at a checkpoint in Baghdad on Tuesday, Dec. 28, 2010. Security officials are investigating the possibility of removing some of the hundreds of checkpoints across the city in a sign of the improving security situation. The checkpoints are designed to catch insurgents, but they also slow traffic in the already congested city. (AP Photo/Hadi Mizban)

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A man on Monday tries to restrain a woman reacting outside a motel room where authorities say five teenagers apparently died of carbon monoxide poisoning in Hialeah, Fla. (Associated Press)

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Gov. Arnold Schwarzenegger said he wanted to "end the crazy deficit spending," but the deficit is as high as ever and has plagued Mr. Schwarzenegger. (Associated Press)

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A New Jersey state trooper arrives to assist people after their cars collided in a heavy snowfall on Rt.295 near Columbus, N.J. (AP Photo/Mel Evans)

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A cherry tree branch hangs over an iced-over Tidal Basin as the Washington Monument stands in the background in Washington. (AP Photo/Jacquelyn Martin)

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ASSOCIATED PRESS Pilot Mark Shelton carefully lowers two desert bighorn sheep to the ground at Elephant Mountain Wildlife Management near Alpine, Texas.

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An overturned SUV lies in a snowy ditch along I-40 in western North Carolina at Mile Marker 48 on Saturday, Dec. 25, 2010. Much of North Carolina was under a winter storm warning. (AP Photo/The Asheville Citizen-Times, Margaret Hester)

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In this March 2, 2010 photo provided by U.S. Fish and Wildlife Service biologist Susi von Oettingen bats are seen in a bunker in New Hampshire. Oettingen is part of a team that will study the habitat of the bats over the winter. (AP Photo/U.S. Fish and Wildlife Service, Susi von Oettingen)

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** FILE ** In this Oct. 21, 2010, file photo, Environmental Protection Agency (EPA) Administrator Lisa Jackson, listens during a news conference at the National Press Club in Washington. (AP Photo/Alex Brandon, File)

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Associated Press EPA chief Lisa P. Jackson says greenhouse gases threaten the health of Americans and contribute to climate change.

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Titik Yuniarti is treated Dec. 15 in a Langsa, Indonesia, hospital for her injuries after she was beaten by a mob accusing her of attempting to abduct a child while searching for her daughter, who went missing in the 2004 Indian Ocean tsunami.

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Pardee Homes touts the 'green' aspect of its new Fair Oaks Ranch homes in Santa Clarita, Calif., on Wednesday, Dec. 15, 2010. More people purchased new homes in November, but not enough to signal that better times are ahead for the battered housing industry. (AP Photo/Reed Saxon)

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Firefighters help a woman from her vehicle on a flooded street in Los Angeles on Thursday, Dec. 22, 2010. The tail end of a storm that dumped rain on Southern California for nearly a week gave the region one final lashing, burying cars in mud, washing hillsides onto highways, flooding urban streets and threatening dozens of canyon homes. (AP Photo/Mike Meadows)

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Stanley Martin Homes is building 215 single-family homes on quarter-acre homesites at Primrose Park in Wildewood, located in California in St. Mary's County. The homes have 1,801 to 3,292 finished square feet, with base prices from $269,990 to $372,990.