Cow manure digester leaks offset their climate benefits

A new study shows that systems designed to capture methane from cow manure, called dairy digesters, are highly effective.

But on the rare occasions they fail, the leaks are large enough to offset their climate benefits.

“I think manure emissions on dairies are underestimated. These digesters seem to be a solution that captures a lot of methane,” says Alyssa Valdez, a University of California...