Environment

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This Harlingen shelter where immigrant children and teens who come to the U.S. without a parent or guardian has doubled its capacity since 2010. It is one of more than 90 state-licensed shelters, detention centers and foster homes the government calls "safe havens." (AP Photo/Houston Chronicle, Johnny Hanson)

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About 40 people on horseback ride to the Nevada Capitol in Carson City, Nev., on Friday, May 30, 2014, to deliver petitions to Gov. Brian Sandoval, over federal management of grazing on public lands. The riders blocked northbound traffic on U.S. 395 for about two hours. (AP Photo/Sandra Chereb)

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Nevada Gov. Brian Sandoval, left, accepts petitions from Assemblyman Ira Hansen, R-Sparks, and Battle Mountain ranchers Pete and Lynn Tomara on Friday, May 30, 2014, in Carson City, Nev. About 40 ranchers rode horses to the governor's office to deliver the petitions critical of federal management of grazing on public lands. (AP Photo/Sandra Chereb)

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Clemson pitcher Matthew Crownover wipes his face after hitting an Oregon batter during the fourth inning of an NCAA college baseball regional tournament game Friday, May 30, 2014, in Nashville, Tenn. (AP Photo/Mark Humphrey)

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Jessica Azulay of Alliance for a Green Economy, left, and Keith Schue of Sustainable Otsego unload boxes of comments at the New York State Energy Research and Development Authority offices on Friday, May 30, 2014, in Albany, N.Y. The comments, filed on the deadline for responding to the draft state energy plan issued in January, urge New York officials to reject additional natural gas drilling as any sort of environmental solution, calling instead for a much stronger push for renewable and cleaner solar and wind power. (AP Photo/Mike Groll)

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Sid Freeman, 53, and his son Wes Freeman, 22, right, fix an irrigation line at a portion of land on their farm near Caldwell Friday May 23, 2014. (AP Photo/The Idaho Statesman, Darin Oswald)

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President Barack Obama speaks at Federal Emergency Management Agency (FEMA) headquarters in Washington, Friday, May 30, 2014, during a hurricane preparedness meeting. at right is Federal Emergency Management Agency (FEMA) administrator Craig Fugate. (AP Photo/Carolyn Kaster)

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South Carolina Gov. Nikki Haley answers a question during a news conference in North Charleston, S.C., on Friday, May 30, 2014 as Kim Stenson, the director of the South Carolina Emergency Management Division looks on. The governor and emergency officials toured the coast urging residents to be prepared for the hurricane season that begins on June 1. (AP Photo/Bruce Smith)

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This May 25, 2014 photo provided by the Oregon Department of Fish and Wildlife shows OR-26, a 100-pound adult male wolf trapped outside La Grande, Ore., and fitted with a GPS tracking collar. The wolf is the 26th to be fitted with a tracking collar since wolves started swimming the Snake River from Idaho in the 1990s. The latest estimate puts Oregon's wolf population 65. A similar collar on Oregon's famous wandering wolf, OR-7, made it possible to track his travels across Oregon into Northern Claifornia in search of a mate. (AP Photo/Oregon Department of Fish and Wildlife)