Black Angus cows stand together in their paddock. Cows produce methane, a potent greenhouse gas.
Black Angus cows stand together in their paddock. Cows produce methane, a potent greenhouse gas. Michael Probst AP
Black Angus cows stand together in their paddock. Cows produce methane, a potent greenhouse gas. Michael Probst AP

If the U.S. went vegan, emissions would drop. But there’s a catch, a new study says

November 14, 2017 08:34 PM

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