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If we're measuring in terms of difficulty, CO2 is a much bigger problem than contrails.

Yes, contrails appears to be mostly solvable at a small cost in time and fuel and people have started to take action on that.

For most flights today though, if you only count the CO2 produced you're understanding the climate damage by about half.

It's one way to look at it I guess. CO2 is still the half of the damage that's way harder to fix.

Which is why work on fixing contrails is so important, it’d be insane to leave 50% improvement at a tiny cost unresolved whilst clawing back small percentage efficiency gains in co2 release from incremental and hideously expensive engine improvements.

We need to do both of course, but contrails should’ve been resolved the moment they were identified as so significant, it’s frustrating how slowly the industry responds to such an enormous opportunity (“we halved our climate impact last year” would be easy marketing)

As long as win there doesn't get used as an excuse to procrastinate on reducing co2. If you asked me I would favor a ban on all non-emergency flying which solves both problems.

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