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JustHereToGain t1_iy9b2rh wrote

Reply to comment by Orvanis in World’s first test run of a hydrogen jet engine a success by BlitzOrion

Water vapor in aviation is estimated to play a huge roll in the greenhouse effect. Most estimations rate it as damaging to the climate as the emitted CO2 or even higher. And that's just from the halo effect of normal planes. Now imagine the impact if it actively shoots out more water.

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MrHazard1 t1_iy9zfq1 wrote

But it's much better in the long term, because co2 is not condensible. The water vapor will relatively soon condense back to water, while co2 remains in the atmosphere for many years and just keep cumulating

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Hibatica t1_iy9c8gt wrote

Also, at the height planes fly, not much water naturally makes it up there, right?

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