As Planes Go Green, Is Sustainable Space Fuel Next?

Meanwhile, Singapore’s GenZero, in partnership with the World Economic Forum, has launched the Green Fuel Forward Initiative, aiming to scale SAF across the Asia-Pacific region. This initiative unites airlines, aerospace manufacturers, and financiers to create a self-sustaining SAF market—one that can meet the demand of one of the world’s fastest-growing aviation hubs.

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A sustainable aviation alternative that enables intrepid luxury travel, OceanSky Cruises’s airship is a 100-metre-long hybrid aircraft, combining buoyancy from helium with aerodynamic lift created by the shape of its hull. Driven forward by four propellors, the vehicle can fly continuously for days. Can it run on SAF?

In the skies above Britain and across the Asia-Pacific, a green revolution is accelerating—not in the fields, but in the jet streams. Two major international moves this month signal that Sustainable Aviation Fuel (SAF) is no longer a niche technology but a critical pillar of the future of flight. And as Earth-bound aircraft start to go green, a tantalizing question arises: can space travel do the same?

The United Kingdom has taken a decisive step in accelerating SAF adoption by raising its co-processing blend limit from 5% to 30%. Endorsed by the UK Ministry of Defence and enshrined in Defence Standard 91-091, this regulatory leap allows waste oils and renewable feedstocks to be refined alongside fossil fuels—without requiring massive infrastructure overhauls.

Industry players like BP and the International Air Transport Association (IATA) have applauded the move, highlighting that SAF produced under these standards meets rigorous global aviation fuel benchmarks such as ASTM D1655. This isn’t a backdoor greenwashing scheme