Environment

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Neighbors comfort one another amid the debris that once was their homes along Highway 160 in Henryville, Ind., on Saturday, March 3, 2012. (AP Photo/Garry Jones)

Piles of splintered wood is all that remains of homes in Henryville, Ind., Friday, March 2, 2012, in Marysville, Ind. Powerful storms stretching from the Gulf Coast to the Great Lakes flattened buildings in several states, wrecked two Indiana towns and bred anxiety across a wide swath of the country in the second powerful tornado outbreak this week. (AP Photo/The Courier-Journal, Michael Clevenger)

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A semitrailer lies on its side in front of the remains of a gas station following severe storms Friday, March 2, 2012, in Henryville, Ind. Tornadoes ripped across several small southern Indiana towns on Friday, killing at least three people and leaving behind miles of flattened devastation along the border with Kentucky. (AP Photo/Timothy D. Easley)

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The remains of the Henryville High school are examined by firefighters and residents of Henryville following severe storms that went through the area, Friday, March 2, 2012, in Henryville, Ind. Tornadoes ripped across several small southern Indiana towns on Friday, killing at least three people and leaving behind miles of flattened devastation along the border with Kentucky. (AP Photo/Timothy D. Easley)

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Downed power lines and debris caused by a reported tornado lie along Yarbrough Road, Friday, March 2, 2012, in Harvest, Ala. (AP Photo/The Huntsville Times, Bob Gathany)

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Greg Cook hugs his friend David Derrick at East Limestone community on Friday, March 2, 2012. A reported tornado destroyed several houses in northern Alabama as storms threatened more twisters across the region Friday (AP Photo/The Decatur Daily, Gary Cosby Jr.)

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Greg Cook hugs his dog Coco after finding her inside his destroyed home in the East Limestone, Ala. on Friday, March 2, 2012. A reported tornado destroyed several houses in northern Alabama as storms threatened more twisters across the region Friday (AP Photo/The Decatur Daily, Gary Cosby Jr.)

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A funnel cloud begins to form over the Canebrake Subdivision of Athens, Ala., Friday, March 2, 2012. Homes were damaged and utilities were interrupted when several suspected tornadoes struck Limestone County Friday morning. (AP Photo/Chris Simmons, Athens Fire and Rescue Dept.)

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Andrew Ridnour salvages items from his home in East Limestone County, Ala., on Friday. March 2, 2012. A reported tornado destroyed several houses in northern Alabama as storms threatened more twisters across the region Friday (AP Photo/The Huntsville Times, Robin Conn)

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A stop sign lays over in the KC Estates subdivision after severe weather passed Hodgenville, Ky. on Wednesday Feb. 29, 2012. Waves of strong storms ripped roofs off homes, apartment buildings and a bank and destroyed several buildings in north-central Kentucky. (AP Photo/Patti Longmire)

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Kendra McKinley pulls a flag from the debris of her grandparents river camp home in Henderson Ky. Wednesday, Feb. 29, 2012. Waves of strong storms ripped roofs off homes, apartment buildings and a bank and destroyed several buildings in north-central Kentucky. (AP Photo/The Gleaner, Darrin Phegley)

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People try to salvage what they can after a tornado destroyed homes in their neighborhood Wednesday, Feb. 29, 2012, in Harrisburg, Ill. The tornado that blasted Harrisburg, killing six, was an EF4, the second-highest rating given to twisters based on damage. Scientists said it was 200 yards wide with winds up to 170 mph. (AP Photo/Seth Perlman)

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Family members and friends try to salvage what they can after a tornado destroyed their neighborhood homes Wednesday, Feb. 29, 2012, in Harrisburg, Ill. The tornado that blasted Harrisburg, killing six, was an EF4, the second-highest rating given to twisters based on damage. Scientists said it was 200 yards wide with winds up to 170 mph. (AP Photo/Seth Perlman)

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Judy Hudnall sift through the debris left from Wednesday morning's storm in Henderson Ky. Wednesday, Feb. 29, 2012. Waves of strong storms ripped roofs off homes, apartment buildings and a bank and destroyed several buildings in north-central Kentucky. (AP Photo/The Gleaner, Darrin Phegley)

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A prosthetic leg found among the debris caused by a tornado that ripped through Harrisburg, Ill. leans against a damaged home Wednesday, Feb. 29, 2012. The tornado that blasted Harrisburg, killing six, was an EF4, the second-highest rating given to twisters based on damage. Scientists said it was 200 yards wide with winds up to 170 mph. (AP Photo/Robert Ray)

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Volunteers and state officials work to cleaning up debris Thurday March 1, 2012 that was deposited in the area by Wednesday's flooding in the Winfield Community near Fairmont in Marion County W. Va. According to officials on sence there were at least two out buildings a fifth wheeler camper, a car and a truck buried in the debris. W.Va Gov. Earl Ray Tomblin issued a state of emergency proclamation for Marion County, W.Va. (AP Photo/Times West Virginian, Tammy Shriver)

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Volunteer firefighters place a tarp on the roof of a home after an apparent tornado damaged a few homes in the area just south of Slocomb, Ala., on Thursday afternoon, March 1, 2012. (AP Photo/The Dothan Eagle, Jay Hare)

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Geese fly over Mad Island, Texas, in mid-February. In a typical winter, the Texas Gulf Coast is packed with tens of thousands of migrating birds. But this year, an annual count just before Christmas found the population had dropped steeply. (Associated Press)

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In "The Lorax," an evil industrialist called the Once-Ler deforests an entire region while harvesting Truffula trees to produce garments made from their silky threads. (Universal Pictures via Associated Press)