Environment

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Rubble is seen Friday, March 14, 2014, two days after a natural gas explosion leveled two apartment buildings in New York, Friday, March 14, 2014. Using sound devices to probe for voices and telescopic cameras to peer into small spaces, workers searching a pile of rubble from a gas explosion in the East Harlem section of Manhattan, continued to treat it as a rescue operation, holding onto the possibility of finding survivors from a blast that brought down two apartment buildings and killed at least eight people. (AP Photo/Julio Cortez)

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This photo released by the North Dakota Department of Health the flooding of about 16 wells near the confluence of the Yellowstone and Missouri rivers, Friday March, 14, 2014. One well, which is the one in the photo, actually had a spill. (AP Photo/North Dakota Department of Health)

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This photo released by the North Dakota Department of Health the flooding of about 16 wells near the confluence of the Yellowstone and Missouri rivers, Friday March, 14, 2014. One well, which is the one in the photo, actually had a spill. (AP Photo/North Dakota Department of Health)

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FILE - In this June 6, 2013 file photo, crews from Waste Control Specialists load the first of two containers with low-level radioactive waste from Los Alamos National Laboratory in New Mexico, into a reinforced 8-inch-thick concrete container at the 90-acre federal dump where it will remain forever, near Andrews, Texas. Officials in Loving County, Texas want to store used nuclear fuel from the state’s four reactors, and possibly from other states, in a business venture they believe could bring jobs and billions of dollars to the region. (AP Photo/Betsy Blaney, File)

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FILE - In this March 26, 1999 file photo, the first load of nuclear waste arrives in Carlsbad, N.M. Officials in Loving County, Texas want to store used nuclear fuel from the state’s four reactors, and possibly from other states, in a business venture they believe could bring jobs and billions of dollars to the region. (AP Photo/Thomas Herbert, File)

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FILE - This Feb. 27, 2009 file photo courtesy of the U.S. Department of Energy's Carlsbad Field Office shows the arrival of the first remote-handeled transuranic waste at the Waste Isolation Pilot Plant near Carlsbad, N.M. Officials in Loving County, Texas want to store used nuclear fuel from the state’s four reactors, and possibly from other states, in a business venture they believe could bring jobs and billions of dollars to the region. (AP Photo/Courtesy of U.S. Department of Energy's Carlsbad Field Office, Dirk Roberson, File)

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The charred remains of a tree stand in a swamp near Aliceville, Ala., on Wednesday, March 5, 2014. A train carrying nearly 3 million gallons of oil derailed and burned at the site in November 2013, resulting in the damage. Environmental regultors say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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Crude oil seeps into water in a swamp near Aliceville, Ala., on Wednesday, March 5, 2014. A train carrying nearly 3 million gallons of oil crashed at the site in November 2013, resulting in the pollution. Environmental regultors say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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A barrier meant to contain spilled crude oil stands partially submerged in a swamp near Aliceville, Ala., on Wednesday, March 5, 2014. A tanker train carrying nearly 3 million gallons of oil derailed and burned at the site in November 2013, resulting in the pollution. Environmental regultors say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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Material meant to contain spilled crude oil lines the side of a railroad bed in a swamp near Aliceville, Ala., on Wednesday, March 5, 2014. A train carrying nearly 3 million gallons of oil derailed and burned at the site in November 2013, resulting in the pollution. Environmental regultors say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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CORRECTS DATE FROM MAY 5 TO MARCH 5 - Crude oil seeps into water in an isolated wetland near Aliceville, Ala., on Wednesday, March 5, 2014. A train carrying nearly 3 million gallons of oil crashed at the site in November 2013, resulting in the pollution. Environmental regultors say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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CORRECTS DATE FROM MAY 5 TO MARCH 5 - A mixture of crude and weathered oil floats atop water in a swamp near Aliceville, Ala., on Wednesday, March 5, 2014. A train carrying nearly 3 million gallons of oil crashed at the site in November 2013, resulting in the pollution. Environmental regultors say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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Environmentalist John Wathen of Waterkeeper Alliance looks over a swamp near Aliceville, Ala., on Wednesday, March 5, 2014. A train carrying nearly 3 million gallons of oil crashed at the site in November 2013, polluting the site. Environmental regultors and the railroad say cleanup and containment work is continuing, but critics contend the Alabama accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)

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John Wathen, an environmentalist with the Waterkeeper Alliance, gestures at the site of a train derailment and oil spill near Aliceville, Ala., on Wednesday, May 5, 2014. Environmental regultors say cleanup and containment work is continuing at the site, but critics contend the accident and others show the danger of transporting large amounts of oil in tanker trains. (AP Photo/Jay Reeves)