An air-quality specialist says he expects strategies to reduce cattle methane emissions to greatly expand over the next five years.

Frank Mitloehner, a professor at the University of California-Davis, tells Brownfield carbon credits for capturing methane emissions from anaerobic digesters are helping farmers overcome cost barriers.

“In my opinion, within the next five years or so, it could happen that half of California’s dairy cows produce manure that ends up in a digester producing biogas, and as a result are receiving carbon credits.”

But he says those efforts are not enough to meet California mandates of a 40 percent methane reduction by 2030 and other technologies are needed.

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