Environment

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In this Aug. 30, 2010 photo, Sandra Nierzwicki-Bauer, director of the Darrin Freshwater Institute, holds samples of Asian clams found in Lake George, in Bolton Landing, N.Y. She leads a team of scientists studying invasive Asian clams in Lake George. Scientists consider the clams arrival a stroke of bad luck that could cause ecological and economic harm. They hope to smother the rapidly reproducing mollusks before they spread. (AP Photo/Mary Esch)

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People stand outside a building damaged by a 7.4-magnitude earthquake in central Christchurch, New Zealand, early Saturday, Sept. 4, 2010. A powerful 7.4-magnitude earthquake struck much of New Zealand's South Island early Saturday. No tsunami alert was issued and there were no reports of injuries, but looters broke into some damaged shops in Christchurch, police said. (AP Photo/NZPA, David Alexander)

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In this image from video, a car lies under fallen rubble in Christchurch, New Zealand after a powerful 7.4-magnitude earthquake struck much of New Zealand's South Island early Saturday, Sept 4, 2010. No tsunami alert was issued and there were no reports of injuries, but looters broke into some damaged shops in Christchurch, police said. The quake, which hit 19 miles (30 kilometers) west of the southern city of Christchurch, shook a wide area. (AP Photo/ TVNZ)

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This satellite image provided by NOAA shows Hurricane Earl taken at 3:15 a.m. EDT on Friday, Sept. 3, 2010. National Weather Service meterologist Jeremy Schulz said early Friday morning that rain bands stretched about 140 miles inland in North Carolina and up to the southern tip of the Chesapeake Bay in Virginia. Sustained winds of about 30 mph were whipping the North Carolina coast. (AP Photo/NOAA)

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A sign reads in Greek "Smoking room" as employees smoke at a state-run bank in central Athens, on Tuesday, Aug. 31, 2010. Greece will implement a comprehensive ban on all indoor public places starting Wednesday, Sept. 1. Greece has among the highest smoking rates among developing countries around the world. (AP Photo/Alkis Konstantinidis )

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Associated Press Boats are seen spraying water on an oil-and-gas platform that exploded in the Gulf of Mexico, off the coast of Louisiana, on Thursday. All 13 crew members, wearing protective "Gumby suits," were rescued.

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Associated Press Cory Freeman watches two stranded goats near Roundup, Mont., on Wednesday. The goats were rescued from the railroad bridge after nearly two days and were in good condition.

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Boats are seen spraying water on an oil and gas platform that exploded in the Gulf of Mexico, off the coast of Louisiana, Thursday, Sept. 2, 2010. All 13 crew members were rescued. (AP Photo/Gerald Herbert)

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Clouds from the outer bands of Hurricane Earl appear over the Atlantic Ocean at sunrise in Nags Head, N.C., on Thursday, Sept. 2, 2010, as Earl approaches the East Coast. The hurricane, with winds swirling at around 145 mph, continued to barrel toward the Eastern Seaboard, and forecasters were trying to pinpoint exactly how close the strongest winds and heaviest surge would get to North Carolina's fragile chain of barrier islands. (AP Photo/Gerry Broome)

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K. Hovnanian Homes is building 50 single-family homes on half-acre sites at North Ridge in Culpeper. The homes have 2,169 to 2,766 finished square feet, with base prices from $234,990 to $264,990.

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Miller and Smith is building 36 town homes at Maple Lawn in Fulton. The homes have 2,978 to 3,279 finished square feet, with base prices from $511,990 to $551,990.

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Anti-dolphin hunt activist Ric O' Barry, center, stands outside the U.S. Embassy in Tokyo after handing out a scroll of petition against dolphin hunt to the Japanese government via the U.S. Embassy in Tokyo, Thursday, Sept. 2, 2010.(AP Photo/Junji Kurokawa)

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FILE - In a Nov. 21, 2009, file photo, Miami running back Damien Berry gestures as he walks off the field after an NCAA college football game against Duke in Miami. Berry and A.J. Highsmith are doing more than trying to uphold Miami's long tradition when they play for the 13th-ranked Hurricanes. They're trying to uphold the legacy of their respective fathers--both former Hurricanes standouts--as well. (AP Photo/Alan Diaz, File)

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New vehicle window sticker proposed by Environmental Protection Agency and Department of Transportation

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A surfer rides the waves in Buxton, N.C., as Hurricane Earl approaches on Wednesday, Sept. 1, 2010. A tourist evacuation of Hatteras Island and Ocracoke Island is under way as the storm heads toward North Carolina's Outer Banks. (AP Photo/Gerry Broome)

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A Pakistani girl waits for relief goods along a road in Muzaffargarh district, Punjab province, Pakistan Tuesday Aug. 31, 2010. Floodwaters that have devastated Pakistan for five weeks headed to the Arabian Sea on Tuesday after swallowing two final towns, but the challenges of delivering emergency aid to 8 million people remained.(AP Photo/Aaron Favila)

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Pakistani flood survivors look into a tent to get relief in a camp set up for displaced people in Hyderabad, Pakistan, on Tuesday. Floodwaters that have devastated Pakistan for five weeks headed to the Arabian Sea on Tuesday after swallowing two final towns, but the challenges of delivering emergency aid to 8 million people remained. (Associated Press)