Last year, the Obama administration canceled plans to make Yucca Mountain the permanent storage site for the nation's nuclear waste. The half-built site is seen here in a file photo from 2006. Isaac Breekken/AP hide caption

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Video Pick: Rooftop Farming In Brooklyn

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Fire Made Arctic Spew, Rather Than Absorb, Carbon

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A Year Later, Michigan Oil Spill Cleanup Continues

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Obama To Announce New Fuel Economy Standards

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This image provided by NASA taken early Friday morning Nov. 5, 2010 shows Hurricane Tomas approximately 175 miles west of Port-au-Prince, Haiti, and moving northeast near 9 mph. Tomas strengthened to a Category One Hurricane overnight with maximum sustained winds now at 80 mph with higher gusts.  NASA hide caption

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A trail camera captures the mountain lion during its journey from west to east. Courtesy of Connecticut Dept. of Energy & Environmental Protection hide caption

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Connecticut Mountain Lion Likely Came From The Black Hills

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Lake Tahoe's South Shore as seen from a ski resort's gondola. Brandon Rittiman for NPR hide caption

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Two States Protect Lake Tahoe, But One Eyes Changes

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Sometimes signs like this aren't enough to dissuade drivers who are blindly following their GPS. Krissy Clark hide caption

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The GPS: A Fatally Misleading Travel Companion

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Extremely hot days are prime for bad air because hydrocarbons evaporate into the air, helping to create ozone. Ramin Talaie/Getty Images hide caption

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EPA Seeks To Tighten Ozone Standards

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As warming temperatures drive polar bears south, they're starting to mix with brown bears much the way they did thousands of years ago. iStockphoto.com hide caption

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Today's Polar Bears Trace Ancestry To ... Ireland?

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Will Global Warming Cause More Extreme Weather?

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Kittiwake young ingest food regurgitated by their parents. USGS hide caption

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The Kittiwake: Winging It, Survival-Wise

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