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Cattle pass a lot of gas, and the methane from their flatulence and especially, their belches, is an expanding burden on the planet. The greenhouse gas has a warming potential 25 times that of carbon dioxide.

Air travel can be a stressful experience for all of us. But for Russell Lehmann, who has autism, a flight delay or cancellation isn't just a small inconvenience. Unexpected changes can cause him to have panic attacks — or worse.

That's what happened when Russell was trying to catch a flight from Reno, Nev., to Cincinnati in June that got delayed.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Facebook will provide the contents of 3,000 ads purchased by a Russian agency to Congress. The political ads ran during the 2016 presidential election campaign. The move comes amid growing pressure on the social network from members of Congress to release the ads.

Facebook CEO Mark Zuckerberg live-streamed a statement in which he said that his company was "actively working" with the U.S. government in the ongoing Russia investigations.

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