"A broad coalition of livestock groups, #FossilFuel giants, #agriculture and environment regulators, utility companies, Republicans and Democrats, and a handful of environmental groups has coalesced to hail manure #biogas as a win-win, untapped source of renewable energy.

Stopping that methane is valuable to society, but with manure #biodigesters, the costs may outweigh the benefits."

https://www.vox.com/future-perfect/392881/dairy-biogas-manure-digester