Clean, renewable energy? Definitely. But we're also going to have to address the impact of factory farming on the environment, if we want a cleaner, healthier planet. More than 80% of U.S. agriculture is devoted to livestock, and hundreds of millions of acres are growing livestock feed. The result? Factory farming is now one of the largest sources of CO2 and the single largest source of both methane and nitrous oxide emissions. http://
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