Across Washington State, hydroelectric dams are blocking salmon as they migrate to their spawning grounds. Enter the salmon cannon. Ingrid Taylar/Flickr hide caption

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The Salmon Cannon: Easier Than Shooting Fish Out Of A Barrel

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Florida Gov. Rick Scott helps release a 30-pound green sea turtle in the Gulf of Mexico in Marathon, Fla., in 2012. The governor is making environmental protection part of his re-election campaign. Andy Newman/AP/Florida Keys News Bureau hide caption

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Climate Policy Takes The Stage In Florida Governor's Race

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Patrick Roy's company, Coastal Rental Equipment, used to rent these large pumps to offshore divers who work for oil and natural gas drillers. After the BP oil spill, when the government introduced a moratorium on drilling in the Gulf of Mexico, the Patterson, La., business suffered losses and eventually shut down. Jeff Brady/NPR hide caption

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As BP Pays For Oil Spill Impact, Some People Aren't Seeing The Cash

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New Yorkers can take city-run classes to learn how to make their homes and businesses less attractive to these guys. Ludovic Bertron/Flickr hide caption

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Rats! New York City Tries To Drain Rodent 'Reservoirs'

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Big brown bats like this one are relatively common in urban areas, sometimes roosting in buildings. Contrary to popular belief, bats rarely carry rabies and are not rodents. They belong to the order Chiroptera, which means "hand-wing." Courtesy of Robert Marquis hide caption

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Night Of The Cemetery Bats

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Colossal Dam Removal Project Frees Washington's Elwa River

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The granulated surface of the lake bed known as the Racetrack is a favorite destination for tourists — and for scientists who want to investigate trails left by the meandering stones. Momatiuk - Eastcott/Corbis hide caption

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An Icy Solution To The Mystery Of The Slithering Stones

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An earlier spring in Montana's Glacier National Park means full waterfalls at first — but much drier summers. Robert Glusic/Corbis hide caption

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There's A Big Leak In America's Water Tower

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Unifi makes Repreve, a thread that comes from plastic waste bottles and leftover polyester scraps, at its Yadkinville, N.C., facility. Courtesy of Unifi hide caption

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Driven By Climate Change, Cotton Buyers Look For Alternatives

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An orange showing signs of "citrus greening" this spring in Fort Pierce, Fla. Joe Raedle/Getty Images hide caption

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The 'Greening' Of Florida Citrus Means Less Green In Growers' Pockets

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A kids healthy snacks display at Giant Eagle. Courtesy of Giant Eagle hide caption

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Grocers Lead Kids To Produce Aisle With Junk Food-Style Marketing

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A view of a road closure to the Vattnajokull glacier, the site of the Bardarbunga volcano under the Dyngjujokull ice cap in Iceland, on Sunday. Scientists had worried that the volcano might spew steam and ash, but say now that it appears to have quieted. Vilhelm Gunnarsson/ Fretabladid/EPA/Landov hide caption

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Pesticides Used On Florida's Mosquitoes May Harm Butterflies

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