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There isn’t enough ‘sustainable’ aviation fuel to make a dent in our emissions – and there won’t be for years

By Ben Purvis, Research Associate, Sustainability Assessment, University of Sheffield

The UK chancellor, Rachel Reeves, has described so-called sustainable aviation fuel (SAF) as a “game changer”. As she announced government support for a series of airport expansions, she said that the fuel “can reduce carbon emissions from flying by 70%”.

This number is misleading. Optimistic estimates do suggest that fully replacing fossil jet fuel with its sustainable…

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