United Airlines and Neste announced that they have signed a new purchase agreement that gives the airline the right to buy up to 52.5 million gallons of Neste MY Sustainable Aviation Fuel over the next three years to fuel United flights at Amsterdam Airport Schiphol, and potentially other airports as well. With this agreement, according to an announcement, United became the first US airline to make an international purchase agreement for sustainable aviation fuel (SAF). Lauren Riley, United’s chief sustainability officer, said reducing carbon emissions from fuel use is the fastest way the carrier will reach its 100% green goal by 2050. She said the demand from customers to limit their emissions from flying is growing exponentially. This supply agreement is enabled, according to the announcement, by Neste’s ambitious growth strategy, which will see the company producing 515 million gallons of SAF per year by the end of 2023. Neste has been producing and delivering SAF since 2011, supplying the fuel to customers in Europe, Asia and the Americas. Neste’s SAF, said the announcement, reduces life cycle greenhouse gas emissions up to 80% and burns cleaner than conventional jet fuel.