Virgin Atlantic Airways flew the first biofuel demonstration flight in 2008. Eleven years later, no airline has done much more than that. One of the major elements in reducing aviation-produced greenhouse gases has yet to take off. Airlines advertise green initiatives and grab headlines with special flights powered partly by oil produced from plants and other green sources. But biofuel use is but a drop in a very big bucket: United Airlines, ahead of most airlines in green initiatives, burned 1 million gallons of biofuel...

Source: Wall Street Journal February 13, 2019 14:26 UTC