HMM: Boeing, Virgin, Join Group Committed to Biofuel Development for Commercial Airlines. “The mission of the Sustainable Aviation Fuel Users Group is to bring renewable fuel sources (that will reduce carbon emissions) into commercial aviation, while simultaneously lessening the industry’s exposure to the volatility of oil prices, and dependence on fossil fuels. The group is receiving support and advice from the World Wildlife Fund (WWF) and Natural Resources Defense Council (NRDC).”