Environment

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This book cover image released by The Penguin Press shows "A Climate of Crisis: America in the Age of Environmentalism." by Patrick Allitt. (AP Photo/The Penguin Press)

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Sen. Pete Kelly, R-Fairbanks, speaks on the floor of the Alaska Senate during discussion of proposed amendments to a bill aimed at advancing a major liquefied natural gas project on Tuesday, March 18, 2014, in Juneau, Alaska. (AP Photo/Becky Bohrer)

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** FILE ** Sen. John Kerry, D-Mass., left, delivers his opening remarks on Capitol Hill in Washington, Tuesday, Oct. 27, 2009, before the Senate Environment and Public Works Committee hearing on clean energy jobs. Seated behind him , from left are, then Transportation Secretary Ray LaHood, Energy Secretary Steven Chu, Interior Secretary Ken Salazar, Federal Energy Regulatory Commission Chairman Jon Wellinghoff, and Environmental Protection Agency Administrator Lisa Jackson. (AP Photo/Susan Walsh)

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Georgia running back Todd Gurley (3), left, takes a handoff from Georgia quarterback Hutson Mason (14) during a Georgia spring football practice on Tuesday, March 18, 2014, in Athens, Ga. (AP Photo/Athens Banner-Herald, AJ Reynolds)

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Georgia running back Todd Gurley (3), left, and Georgia running back Keith Marshall (4) laugh between drills during a Georgia spring football practice on Tuesday, March 18, 2014, in Athens, Ga. (AP Photo/Athens Banner-Herald, AJ Reynolds)

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Georgia quarterback Hutson Mason (14) drops back to pass during a Georgia spring football practice on Tuesday, March 18, 2014, in Athens, Ga. (AP Photo/Athens Banner-Herald, AJ Reynolds)

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In this Monday, March 17, 2014 photo, Geese walk around the Olentangy River near Ohio State University in Columbus, Ohio. Columbus plans to use fireworks and lasers to scare off the birds it says are thwarting the city's efforts to develop newly widened river banks, according to the Columbus Dispatch. (AP photo/ The Columbus Dispatch, Adam Cairns)