EPA Proposes New Rule To Clean Up Gasoline And Reduce Smog
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The city of Gladstone near the Great Barrier Reef is the world's fourth largest coal-export hub. Dredges, like one seen here, have turned the harbor brown as they work to expand the coal port. Richard Harris/NPR hide caption

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Ken Caldeira of the Carnegie Institution for Science takes a water sample during his experiment out on part of the Great Barrier Reef. The water is slightly pink because his team is using a dye to trace an acid-neutralizing chemical as it flows across the reef. Richard Harris/NPR hide caption

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On Australia's Heron Island, buff-banded rails like this one have become the avian equivalent of a weed. Richard Harris/NPR hide caption

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The Call Of The Shearwater
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Heron Island is located on the southern end of the Great Barrier Reef, about 25 miles off the northeast coast of Australia. Ted Mead/Getty Images hide caption

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'God Particle' Discovery Disappoints Some Physicists
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Increased Humidity From Climate Change Could Make It Harder To Tolerate Summers
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Perch exposed to the anxiety drug oxazepam were more daring and ate more quickly than fish that lived in drug-free water. Courtesy of Bent Christensen hide caption

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Traces Of Anxiety Drugs May Make Fish Act Funny
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An official with the Korea Meteorological Administration shows a seismic image of a tremor caused by North Korea's nuclear test, in Seoul on Tuesday. Kim Jae-Hwan/AFP/Getty Images hide caption

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Did North Korea Test A 'Miniature' Nuclear Bomb?
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Vegetation like the kind growing here at Michigan State University's Kellogg Biological Station could one day be used to feed small biofuel refineries spread throughout the Midwest. J.E.Doll/Michigan State University hide caption

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Could Some Midwest Land Support New Biofuel Refineries?
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2012 Smashes Record For Hottest Year In The Lower 48
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Drilling Rig's Thick Hull Helps Prevent Oil Spill
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Oil Drilling Rig Runs Aground In Alaska
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