The new U.S. Renewable Fuels Standard (RFS), signed into law last month as part of the revised Energy Bill, sets high goals for the U.S. biofuels industry. It calls for the production of 36 billion gallons of biofuels—mainly ethanol and biodiesel—annually by 2022, with 21 billion gallons coming from so-called "advanced biofuels," which can be produced using a variety of new feedstocks and technologies. Of this, roughly 16 billion gallons is expected to be from "cellulosic biofuels," derived from plant sources such as trees and grasses.
But are these biofuels targets realistic, and can they be met without serious impacts on the nation's farmlands, forests, waterways, and rural communities? The answer is complicated, but fortunately the RFS bill contains a few key caveats that can be used to "stop the buildup" if things go wrong. Read full here by Raya Widenoja, a research associate at the Worldwatch Institute, is the lead author of the joint Worldwatch/Sierra Club report Destination Iowa: Getting to a Sustainable Biofuels Future.