The U.S. Court of Appeals for the 9th Circuit will hear October 16 a lawsuit brought by industry groups, including the Renewable Fuels Association and the National Petroleum & Refiners Association, challenging California’s landmark low-carbon fuel standard. The standard requires transportation fuels to be 10 percent less carbon-intensive by 2020. Should the standard be deemed unconstitutional, the state would have to find a new way of meeting its mandate to reduce greenhouse gas emissions to 1990 levels by 2020.