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hackernud3stoday at 1:03 AM1 replyview on HN

The fuel consumption feels like the bigger problem since contrails last for hours vs co2 that lasts damn near forever.


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ZeroGravitastoday at 2:43 AM

They are roughly equal problems at the moment.

> Recent estimates show that contrails cause about the same amount of warming each year as all the CO₂ emitted by all flights from 1940 to 2018.

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