Exclusive: Emvolon raises $10.5M to make biogas with car engines

Biofuels startup Emvolon has raised $10.5 million to use automobile engines to produce liquid fuel at farms, landfills and industrial sites. Why it matters: By turning methane into fuel on-site, the company says it's solved one of the toughest challenges facing biofuels production. State of play: Methane is a potent greenhouse gas and the central ingredient for a variety of fuels. Yes, but: Transporting the gas from where it's being emitted to where it can be made into fuel is often prohibitively expensive, requiring either new pipelines or costly compressors....