Environment

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Icicles hang from a sign Wednesday, Feb. 2, 2011 in Hightstown, N.J. Freezing rain overnight left a coating of ice on New Jersey roads, encased trees and power lines, and glazed snow drifts. (AP Photo/Mel Evans)

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People enjoy high waves from Lake Michigan, Wednesday, Feb. 2, 2011, in Milwaukee. The area was under a blizzard warning and some freeways were shut down. (AP Photo/Jeffrey Phelps)

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Charlotte, North Carolina. (Associated Press)

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Hospital patients are transported to safety as Cyclone Yasi threatens massive damage in Cairns, Australia. Extra commercial flights were scheduled so residents could evacuate. (Associated Press)

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A freezing mist settles over Washington at dawn on Tuesday, Feb. 2, 2011, as icy winter weather advances toward the nation's capital. The Washington Monument is seen in the distance amid the cherry trees bordering the Tidal Basin. (AP Photo/J. Scott Applewhite)

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A tree-trimming crew clears frozen tree branches from power lines as an Ohio Department of Transportation crew plows and spreads salt on State Route 721 at U.S. 36 near Bradford, Ohio, on Tuesday, Feb. 1, 2011. (AP Photo/Piqua Daily Call, Mike Ullery)

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An ice-covered tree glistens from spotlights on the grounds of the Indiana War Memorial in downtown Indianapolis on Monday, Jan. 31, 2011. (AP Photo/Michael Conroy)

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Two local residents walk through floodwater after getting ice and food to take to their flooded residence in the suburb of New Farm in Brisbane, Australia., on Jan. 13, 2011. Cyclone Yasi, a strong tropical cyclone, roared toward Australia's flood-ravaged northeast on Monday, Jan. 31, 2011, prompting evacuations and warnings from officials that the storm could be the worst the already-swamped region has ever seen. (AP Photo/Tertius Pickard, File)

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** FILE ** Iranian technicians work at the Bushehr nuclear power plant outside the southern city of Bushehr, Iran, in August 2010. (AP Photo/International Iran Photo Agency, Ebrahim Norouzi, File)

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In this Dec. 2010 photo provided by the Florida Fish and Wildlife Conservation Commission, a North Atlantic right whale is seen entangled in rope off the coast of Daytona Beach, Fla. Researchers succeeded this month in using sedatives fired from a dart gun to calm down and free an endangered North Atlantic right whale tangled in fishing line. (AP Photo/Florida Fish and Wildlife Conservation Commission)

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National Highway Traffic Safety Administrator Davis Strickland makes a statement as U.S. Transportation Secretary Ray LaHood looks on during a news conference announcing the new Driver Alcohol Detection System for Safety (DADSS) in Waltham, Mass., Friday morning, Jan. 28, 2011. (AP Photo/Stephan Savoia)

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FILE - In this Sept. 11, 2005 file photo, the Louisiana Superdome sits in the foreground as floodwaters from Hurricane Katrina continue to recede in New Orleans. The 36-year-old Louisiana Superdome is getting its biggest overhaul since Hurricane Katrina tore away a lot of the roof and flooded the arena with millions of gallons of water. (AP Photo/David J. Phillip, Pool, File)

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FILE - In a May 5, 2010 file photo, Dusty Chauvin watches as the Mariah Jade passes through a patch of oil dispersant off the coast of Louisiana in the Gulf of Mexico. The most extensive study to gauge the effectiveness of chemical dispersants used deep in the ocean on the BP oil spill found mixed results. It appeared to keep some oil from bubbling up to the surface where it could do worse damage, but it didn't appear to biodegrade the oil quite as fast as promised. (AP Photo/The Houma Courier, Matt Stamey, File)

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Pigs enjoy relatively clean pens at the Little Donkey Farm, which claims to use no chemicals of any kind to raise or treat the pigs. Clenbuterol, known in China simply as "lean meat powder," is a dangerous drug that's banned in China's food supply. (Associated Press)