California is cracking down on cow farts

In California's fight against global warming, the nation's leading agricultural state is now targeting greenhouse gases produced by dairy cows and other livestock. Despite strong opposition from farmers, Gov. Jerry Brown signed legislation in September that, for the first time, regulates heat-trapping gases from livestock operations and landfills. Cattle and other farm animals are major sources of methane, a greenhouse gas many times more potent than carbon dioxide as a heat-trapping gas. Methane is released when they belch, pass gas and make manure. If we can reduce emissions of methane, we can really help to slow global warming.