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US aerospace and jet manufacturer Boeing will begin delivering commercial jets capable of flying on 100% biofuel by the end of the decade, the company announced on 22 January.

Boeing had conducted successful test flights replacing petroleum jet fuel with 100% sustainable fuels, the company said.

"Our industry and customers are committed to addressing climate change, and sustainable aviation fuels are the safest and most measurable solution to reduce aviation carbon emissions in the coming decades," said Boeing commercial airplanes president and CEO Stan Deal.

"We're committed to working with regulators, engine companies and other key stakeholders to ensure our airplanes and eventually our industry can fly entirely on sustainable jet fuels."

Boeing said it was looking into the changes needed for its current and future commercial jets to fly on 100% sustainable fuels, and was committed to working with regulatory authorities and industry to raise the blending limit for expanded use.

"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,” Boeing’s chief sustainability officer Chris Raymond said.

Boeing had started conducting biofuel test flights in 2008, the company said, and had gained approval for sustainable fuels in 2011.

Sustainable aviation fuels reduced CO₂ emissions by up to 80% over the fuel’s life cycle with the potential to reach 100% in the future, according to the US Department of Energy’s Air Transport Action Group.

Boeing said sustainable aviation fuels were currently mixed directly with conventional jet fuel up to a 50/50 blend – the maximum allowed under current fuel specifications.

However, to meet aviation’s commitment to reducing carbon emissions by 50% from 2005 levels by 2050, jets needed the capability to fly on 100% sustainable aviation fuels well before that deadline, according to Boeing.