Manure Biogas and Renewable Gas

Manure digesters capture methane from hog and dairy waste to produce biogas or renewable natural gas, often with support from fuel standards and other public incentives.

In North Carolina, projects such as Align RNG connect hog farms to gas infrastructure; in California, dairy digesters are tied to transportation-fuel pathways and carbon-credit rules. Supporters point to methane capture, while residents and advocates raise concerns about air and water pollution, manure management, and whether these projects reinforce intensive livestock operations. The debate also concerns how regulators measure climate benefits and account for burdens on nearby communities.