California’s Green-Energy Subsidies Spur a Gold Rush in Cow Manure
Clean Energy Fuels Corp. , a major distributor of natural gas made from waste, found a way to boost its earnings by millions of dollars, virtually overnight.
All it had to do was switch the main biofuel it supplies to power cars and trucks in California—currently a type of natural gas produced with methane emissions from garbage—to a chemically identical gas produced from the manure of cows.