Sorry to pile in a bit, it's tough as there is a lot to comment on. > "I read comments like this almost every time SpaceX is mentioned here, and climate crisis

Sorry to pile in a bit, it's tough as there is a lot to comment on. > "I read comments like this almost every time SpaceX is mentioned here, and climate crisis extremists bang on about it endlessly. It’s impossible to ignore, it’s just that most people disagree." Respectfully, I feel you are responding to those comments, rather than the ones placed here. How can anyone disagree with the statement that the impact of rocket launches on the atmosphere is not well understood. AFAIK, that is fact. If there are such studies, that would be super interesting, to my knowledge, those studies have not been done (and could not be done because nobody was launching rockets at an appreciable frequency for anyone to even study it). If those studies had been done, I would not expect the punching of holes in the ionosphere to be news.