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jim peden's avatar

We get a fair number of flights overhead and vapour trails are usually visible (on the few days we're not clouded over!). Most of them hang around for a while but some aircraft leave no trail. I assume that's down to the differing humidity of the atmosphere at different altitudes.

If I remember correctly, a few decades ago experts were afraid that all those vapour trails would lead to global cooling and we'd have a new ice age.

I don't pay much attention to experts any more.

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Kitsune, Maskless Crusader.'s avatar

Thanks for this. With all the rest of the previously unbelievable stuff going on, when I saw the title of this post, I thought, “No, not THIS too is true?”

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