this post was submitted on 19 Feb 2026
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The sad thing is that there is a huge amount that could be done for global warming with some basic legislation around contrails. Clouds that high in the atmosphere are quite bad in terms of greenhouse effect. By avoiding flying through areas that they'd be generated there's a surprisingly large environmental benefit for minimal cost. A good explainer: https://youtu.be/QoOVqQ5sa08
I never thought it about as a green house thing before though I do remember reading an article many years ago that contrails do contribute when they spread out into cirrostratus clouds.
I was a meteorologist in the Air Force and did make forecasts telling pilots at what levels to fly to avoid making contrails since having a long silver line pointing to your exact location makes sneak attacks a little difficult. Perhaps commercial airlines should make use of that information. It's usually just a few thousand foot difference. Fly a little higher or lower and problem solved.