[squokko]

I can't imagine that contrails are a significant percentage of cloud cover.

[infradig]

Less than 1% globally, so you're right.

[stevage]

This is the terrible argument that leads so many countries to do nothing to reduce their emissions. Each country is a small portion of the total so they all do nothing.

[smakt]

This is bullshit. How can anyone pretend the radiation reflecting from it is significant? How wide are these things? 20 meters?

[ceigey]

That’s narrower than a Boeing 737’s wingspan, and when you look at planes leaving a trail behind them, you can often see the trail fan out much wider than the plane.

Not sure how wide that would be, but the length has to be factored in too, which begs the question, how wide and long is a piece of string/cloud?

On the ground looking up the sense of scale falls apart a bit.

[stevage]

There are a lot of them.