Environment

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FILE - This Oct. 10, 2013 file aerial photo shows dead cattle in an area hard hit by a snowstorm that killed thousands of animals near Faith, S.D. The North Dakota Stockmen's Foundation has awarded nearly $200,000 to North Dakota and South Dakota ranchers who lost livestock in the blizzard. The foundation issued the last of its aid checks to ranchers this week with about $163,000 going to producers in North Dakota. (AP Photo/KOTA-TV, Pool, File)

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Gladys Mwende, Benson Muthame and their son cultivate one acre in Nairobi, despite lacking title to the land. (Credit: Olu Akintorln)

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In this undated photo, the Soda Lake in the Mojave National Preserve reflects the sky in San Bernardio County, Calif. A commercial solar project is proposed within a mile of the lake bed, prompting worries about water depletion and the fate of an endangered fish, among other concerns. (AP Photo/The Press-Enterprise, David Danelski) MAGS OUT; MANDATORY CREDIT

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In this February 2014 aerial photo, the white-colored Soda Lake is visible in the Mojave National Preserve in San Bernardio County, Calif. A commercial solar project is proposed within a mile of the lake bed, prompting worries about water depletion and the fate of an endangered fish, among other concerns. (AP Photo/The Press-Enterprise, Kurt Miller) MAGS OUT; MANDATORY CREDIT

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In this undated photo, a female and immature bighorn walk in the Mojave National Preserve in San Bernardio County, Calif. The National Park Service says a proposed 6.5-square-mile solar development about a half-mile from the Mojave National Preserve would harm wildlife. (AP Photo/The Press-Enterprise, Mark Zaleski) MAGS OUT; MANDATORY CREDIT

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In this undated photo, a desert tortoise crawls in the Mojave National Preserve in San Bernardio County, Calif. The National Park Service says a proposed 6.5-square-mile solar development about a half-mile from the Mojave National Preserve would harm wildlife. (AP Photo/The Press-Enterprise, Stan Lim) MAGS OUT; MANDATORY CREDIT

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In this undated photo, burrowing owls looks on in Wildomar, Calif. The National Park Service says a proposed 6.5-square-mile solar development about a half-mile from the Mojave National Preserve would harm wildlife, such as the borrowing owl. (AP Photo/The Press-Enterprise, Stan Lim) MAGS OUT; MANDATORY CREDIT

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In this March 20, 2014, photo released by Lake Superior State University, Steve Gregory, left, and David Drzewiecki, both with Lake Superior State University's physical plant department, eye a snowman effigy LSSU will burn in Sault Ste. Marie, Mich. (AP Photo/Lake Superior State University, Tasha Cook)

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A property owner shores up a dike to ensure protection against the rising of Rice Lake on March 19, 2014 in Minot, N.D. Property owners around Rice Lake in north central North Dakota are once again battling floods, and some are giving up the fight. The lake where 167 people own property and 36 of them live year-round has risen 12 inches in 12 days because of snowmelt, according to Rice Lake Board Chairman Steve Zaun. It is the fourth straight year of flooding, and the lake has now damaged or destroyed about 30 homes. (AP Photo/The Minot Daily News, Jill Schramm)

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Cottonwood trees are cut down by Black Hills Power on Tuesday, March 18, 2014 in Spearfish City Park in Spearfish, S.D. The trees were cut down after being damaged in the past storm and threatened powerlines. The two-day blizzard that hit Oct. 4 dumped as much as 4 feet of snow in the Black Hills, downing or damaging thousands of trees. The Belle Fourche City Council this week approved bids totaling $100,000 to complete tree branch cleanup around town and in a cemetery, the Black Hills Pioneer reported. The city is eligible for federal reimbursement of up to 75 percent of the cost if the cleanup is completed by May 7. (AP Photo/Black Hills Pioneer, Mark Watson )

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ADVANCE FOR RELEASE SUNDAY, MARCH 23, 2014, AT 12:01 A.M. EDT - In this Friday, Feb. 21, 2014 photo, tiny cylinders of reef cores lie on tables inside Western Michigan University's Michigan Geological Repository, in Kalamazoo, Mich. The reef cores are used to study how to flush out oil using carbon dioxide from the reefs. (AP Photo/Kalamazoo Gazette-MLive Media Group, Chuck Miller) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT