Renewable jet fuel producer World Energy announced its participation in United Airlines’ biofuel flight from San Francisco International Airport to Zurich Airport Sept. 14. A United Boeing 787 will be powered by World Energy’s low-carbon aviation fuel, and take place during California Gov. Jerry Brown’s Global Climate Action Summit. The flight is part of an ongoing commitment to addressing climate change and follows on the heels of Brown’s executive order for California to be net-zero carbon by 2045.

“This flight is one of many steps needed to reduce greenhouse gas emissions long-term and meet California’s ambitious climate goals,” said Bryan Sherbacow, chief commercial officer at World Energy Paramount. “World Energy is a pioneer and the global leader of commercial renewable jet fuel, in addition to providing low-carbon solutions to the ground transportation industry. We are excited to continue to provide low-carbon solutions that enable our customers to achieve their sustainability goals, and look forward to continuing this work with companies such as United at airports around the world.”

United will operate Flight 44 from its hub in San Francisco to Zurich with the carrier’s most fuel-efficient aircraft via a blend of sustainable aviation fuel supplied by World Energy. United will use 16,000 gallons of biofuel at a 30/70 blend with conventional jet fuel for the flight to Zurich, representing the longest transatlantic flight to date—and the longest flight by a U.S. airline to date—powered by a biofuel volume of this size.

“At United, we believe there is no point in setting challenging and ambitious goals without also taking tangible steps towards achieving them, especially when it comes to securing the health of our communities and our planet,” said Oscar Munoz, CEO of United Airlines. “While we’re proud to be the first U.S. carrier taking such an ambitious step, particularly when it comes to investing in renewable jet fuel, it is a distinction we look forward to sharing as the rest of the industry catches up and makes similar commitments to sustainability.”

The World Energy and United Airlines partnership started in 2016, with their inaugural flight from LAX. Both companies plan to continue working to decarbonize the air transportation industry by increasing the number of flights using renewable fuel. World Energy sourced the petroleum jet fuel blend for the flight from Chevron, the largest provider of jet fuel at SFO. Chevron also arranged the supply logistics to move the blended product to United at SFO. The Sept. 14 flight includes feedstock from Agrisoma.