United Airlines has committed a US$40 million investment for the development of sustainable aviation fuels and other decarbonization technologies.

In a statement, the Chicago-based airline said the move is part of its commitment to environmental sustainability after earlier agreeing to purchase up to 10 million gallons of sustainable aviation fuel over the next two years.

United's commitment to the environment

United's latest commitment to invest in the development of sustainable aviation fuel and decarbonization technologies, along with its pledge to reduce its greenhouse gas emissions, is a new initiative of the airline to reduce its impact on the environment.

It's other sustainability efforts include:

• Becoming the first airline to incorporate sustainable aviation fuel in regular operations on a continuous basis;
  
  
• Investing more than $30 million in California-based sustainable aviation fuels producer Fulcrum BioEnergy, which remains the single largest investment by any airline globally in sustainable fuels. United's option to purchase, subject to availability, nearly 1 billion gallons from Fulcrum BioEnergy is the largest offtake agreement for sustainable aviation fuel in the airline industry;
  
  
• Operating the flight for the planet last June, which represented the most-eco-friendly commercial flight of its kind in the history of commercial aviation;
  
  
• Becoming the first airline to fly with Boeing's Split Scimitar winglets, which reduce fuel consumption by an additional 2% versus standard winglets;
  
  
• Becoming the first US airline to repurpose items from the carrier's international premium cabin amenity kits and partnering with Clean the World to donate hygiene products to those in critical need;
  
  
• Eliminating non-recyclable plastic stirring sticks and cocktail picks on aircraft and replacing them with a more environmentally friendly product made of 100% bamboo; and 
  
  
• Continuing to replace its eligible ground equipment with cleaner, electrically powered alternatives, with 40% of the fleet converted to date.

United said among all airlines around the world, United holds more than 50% of all publicly announced purchase commitments to using sustainable aviation fuels and is the only US carrier to currently use this fuel on a continuous basis.

"United has always been an industry leader in environmental sustainability – including being the first US carrier to announce a bold pledge to cut our carbon footprint in half by 2050 relative to 2005," said Scott Kirby, United's president.

"However, to achieve this goal, we can't be content as a leading airline undergoing an evolution to adapt to climate change. We aspire to be the airline leading the revolution to fight climate change, and this new initiative will further empower us to reduce our impact on the environment and fly towards a more sustainable future," he added.