An evaluation by US NGO Natural Resources Defense Council (NRDC) of sustainability standards followed by airlines using or intending to use biofuels finds the industry has made great strides in adopting such fuels with some airlines doing better than others on sustainability issues. This is the second annual report by NRDC on aviation biofuels but the first to name and score airlines on an individual basis according to a set of sustainability criteria. Airlines were scored on their participation in industry initiatives to promote sustainability certification, public commitments in sourcing, and the monitoring and disclosure of important sustainability metrics. Airlines with the highest scores include Air France-KLM, British Airways, United, Virgin Atlantic, Cathay Pacific and Alaska. Airlines that might have expected to have performed well such as Lufthansa and American did not respond to the survey.