United, Honeywell Invest in New Clean Tech Venture from Alder Fuels, Powering Biggest Sustainable Fuel Agreement in Aviation History Published on September 10, 2021 Business 853 views United agrees to purchase 1.5 billion gallons of sustainable aviation fuel (SAF) over 20 years - which is one and a half times the size of the rest of the world's airlines' publicly announced SAF commitments combined More