Environment

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FILE - This undated file photo provided by the California Department of Fish and Game shows Sierra Nevada bighorn sheep in California. Nevada wildlife biologists are recommending 100 hunting tags for ewes to reduce the numbers of some bighorn sheep populations and improve the overall health of herds. The Nevada Board of Wildlife Commissioners earlier authorized the hunt _ the first in Nevada targeting female bighorn sheep. (AP Photo/California Department of Fish and Game, file)

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In this April 25, 2014 photo, Joshua Haggmark, interim resources manager for Santa Barbara, Calif., stands next to a desalination plant, which removes salt from ocean water, that has been in storage for more than two decades in Santa Barbara, Calif. The city is considering restarting the plant as California withers in a drought. (AP Photo/Alicia Chang)

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In this April 25, 2014 photo, Joshua Haggmark, interim resources manager for Santa Barbara, Calif., looks at equipment that was dug up from the sea after the city shut down its desalination plant more than two decades ago, in Santa Barbara, Calif. The city is considering restarting the plant, which removes salt from seawater, as California withers in a drought. (AP Photo/Alicia Chang)

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In this April 25, 2014 photo, Joshua Haggmark, interim resources manager for Santa Barbara, Calif., stands next to a desalination plant, which removes salt from ocean water, in Santa Barbara, Calif. The city is considering restarting the plant as California withers in a drought. (AP Photo/Alicia Chang)

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ADVANCE FOR SUNDAY, MAY 4 AND THEREAFTER - In an April 11, 2014 photo, Trevor Jensen, left, and Tyrell Reichert, reposition the body of Dundy County-Stratton High School’s “Power Drive” electric vehicle. The "Power Drive" electric car program, sponsored since 1998 by the Nebraska Public Power District and Omaha Public Power District, gives high school students hands-on experience in a challenge to design and build a safe, energy-efficient one-person electric vehicle. (AP Photo/McCook Gazette, Connie Jo Discoe)

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ADVANCE FOR SUNDAY, MAY 4 AND THEREAFTER - In an April 11, 2014 photo, Keeley Confer takes a turn in the driver’s seat of the electric car, although she is not a driver but the Dundy County-Stratton High School's first-ever electric vehicle competition team’s official records keeper, writing a blog, designing and updating the web page and documenting the car’s and the team’s progress. The "Power Drive" electric car program, sponsored since 1998 by the Nebraska Public Power District and Omaha Public Power District, gives high school students hands-on experience in a challenge to design and build a safe, energy-efficient one-person electric vehicle. (AP Photo/McCook Gazette, Connie Jo Discoe)

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In this Wednesday, Feb. 12, 2014 photo, Lowrider cars line up outside the Mayan Theatre hosting the Lucha VaVoom Valentine’s show of Lucha Libre Mexican wrestling and Burlesque performances in Los Angeles. The esoteric hybrid of American burlesque and Mexican wrestling is an outrageous hit. (AP Photo/Damian Dovarganes)

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In this Wednesday, Feb. 12, 2014 photo, wrestling fan Nikki Layson, left, cheers performers at the Lucha VaVoom Valentine’s show of Lucha Libre Mexican wrestling and Burlesque at the Mayan Theatre in downtown Los Angeles. The esoteric hybrid of American burlesque and Mexican wrestling is an outrageous hit. (AP Photo/Damian Dovarganes)