The quest for green air travel

Sustainable aviation fuel (SAF) has proved capable of powering air travel. But can supply rise and cost fall fast enough to make SAF a major part of the aviation industry’s journey to net-zero emissions?

While aviation is responsible for about 2% of global greenhouse gas emissions, a small but fast-growing amount, it could be two to four times as high by 2050. Its impact on global warming is higher, about 3.5%, because of the formation of high-altitude condensation trails – or “contrails” – which trap heat.

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