I mean the extent of the atmosphere. The Aurora is basically coloring it and you can basically see the entire thing.

I guess in addition… If you burn things, the pollution doesn’t just go away. It fills that sheet of air that we all breathe. I burn wood in winter because I happen to have several dead trees. I buried most of the wood. But one rocket flight is thousands of tons of polluted air. Not directly from the rocket if its just a hydrogen rocket, but thru all the chemical processing needed to make it. Make cars and driving them, burning fuel, all that just goes into that band of air. We’re poisoning ourselves every day. We need to plant trees because they transform those pollutants back to solids and or oxygen. That’s literally the whole argument for fighting global warming. We are polluting the air we breathe and that air is not infinite, you can see over half of it in this photo.

Plasma is very interesting stuff.