At the moment, though, regulations dictate that planes can only use up to a 50/50 blend of conventional jet and sustainable fuels. Boeing (and other planemakers) will still have to work with regulatory authorities to show that it’s safe to raise that limit. Chris Raymond, Boeing’s Chief Sustainability Officer, said in a statement:
“With a long history of innovation in sustainable aviation fuels, certifying our family of airplanes to fly on 100% sustainable fuels significantly advances Boeing's deep commitment to innovate and operate to make the world better. Sustainable aviation fuels are proven, used every day, and have the most immediate and greatest potential to reduce carbon emissions in the near and long term when we work together as an industry.”
The aviation giant has become a fixture in the news over the past year because of the two fatal 737 Max crashes that killed 346 people. It was charged with one count of conspiracy to defraud the United States and reached an agreement with the Department of Justice to avoid prosecution by paying $2.5 billion.