Forty-five percent of California’s methane emissions come from dairies, the largest source of the potent greenhouse gas in the state. The 700 cows on Cace Van Steyn’s dairy farm in Elk Grove excrete about 98,000 pounds of methane-producing waste which is now being converted into enough electricity to power 125 homes. Van Steyn says there are other benefits.

Hear the interview with Capital Public Radio here.