Gasoline from solar and wind power: Zero-carbon doesn’t assure clean or efficient

Prometheus or gasolineThe California startup Prometheus Fuels is one of many efforts aiming to scale up a process that can sound remarkably simple: “We remove CO2 from the air and turn it into gasoline.” The process, which has in recent years seemed alternately like a Holy Grail or a red herring for the oil and gas industry, has already been achieved. But...