Environment

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A man walks out the entrance of the new Mars Inc. production facility near Topeka, Kan., Wednesday, March 26, 2014. It's the company's first new North American production facility in 35 years. (AP Photo/Orlin Wagner)

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A excavator removes debris from a demolished house next to a house with a foreclosure notice in Detroit’s Brightmoor area Monday, March 24, 2014, in Detroit. For years, Brightmoor area residents pleaded with the city to demolish vacant homes that scavengers have stripped of wiring and plumbing and anything of value. Some structures are already gone, and now officials aim to do much more, possibly tearing down as many as 450 empty houses each week across more than 20 square miles of this bankrupt city _ a vast patchwork of rotting homes comparable to the size of Manhattan. (AP Photo/Paul Sancya)

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Debris from a home that was torn down is shown in Detroit’s Brightmoor area Monday, March 24, 2014, in Detroit. For years, Brightmoor area residents pleaded with the city to demolish vacant homes that scavengers have stripped of wiring and plumbing and anything of value. Some structures are already gone, and now officials aim to do much more, possibly tearing down as many as 450 empty houses each week across more than 20 square miles of this bankrupt city _ a vast patchwork of rotting homes comparable to the size of Manhattan. (AP Photo/Paul Sancya)

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Debris from a home that was torn down is shown in Detroit’s Brightmoor area Monday, March 24, 2014, in Detroit. For years, Brightmoor area residents pleaded with the city to demolish vacant homes that scavengers have stripped of wiring and plumbing and anything of value. Some structures are already gone, and now officials aim to do much more, possibly tearing down as many as 450 empty houses each week across more than 20 square miles of this bankrupt city _ a vast patchwork of rotting homes comparable to the size of Manhattan. (AP Photo/Paul Sancya)

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FILE - In this Sept. 24, 2013, file photo, a man steadies himself as he and others work on framing new houses, in Odessa, Texas. America’s energy boom is fueling population growth west of the Mississippi River. New 2013 census information released Thursday, March 27, 2014, showed that six of the 10 fastest-growing metropolitan areas and eight of the 10 fastest-growing counties in the country are located in or near the oil- and gas-rich fields of the Great Plains and Mountain West. More and more oil and gas drilling is being done in those regions, drawing people from around the nation looking for work, the Census Bureau said. Neighboring cities Odessa and Midland, Texas, show up as the second and third fastest-growing metro areas in the country. (AP Photo/Pat Sullivan, File)

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This March 18, 2014 image provided by the U.S. Fish & Wildlife Service shows a pair of endangered nener, Hawaiian geese, ] with their newly-hatched goslings at the James Campbell National Wildlife Refuge near Kahuku on the island of Oahu in Hawaii. A federal biologist said Wednesday, March 26, 2014, these nene, the state bird of Hawaii. They are the first nene to make a home on Oahu since at least the 1700s. (AP Photo/US Fish & Wildlife Service)