Gates: "Don't do drugs!" World: "But you do." Gates: "I'm responsible about it." That'll go over well. Yes, it appears "clean aviation fuel" refers only to

Gates: "Don't do drugs!" World: "But you do." Gates: "I'm responsible about it." That'll go over well. Yes, it appears "clean aviation fuel" refers only to the feed stock, not the energy used to produce the fuel, nor "its total climate impact, including non-CO2 gasses and the fact they are emitted directly into the atmosphere." (quoting Vice).