Cathy Cahill

Feb. 22, 2013

How Wood Smoke Is Dirtying Alaska’s Air

Cathy Cahill, of the University of Alaska Fairbanks, discusses air quality in the Last Frontier.

air pollution, fires, wood burning, heating, smog, particulates, air quality

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Michael Pollan Talks Plants and Food

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Comet's Tail Shines Light on Sun

\tIn 2011, comet Lovejoy traveled through the sun’s corona and lived to tell the tale. But its tail was the most telling. Reporting in the journal Science, Cooper Downs, an astrophysicist at Predictive Science Inc. in San Diego, Calif., says that the wiggly path of the comet’s tail helps explain the sun’s magnetic field. \t 

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