I'm less worried about current biodiversity than I am about the risk of significant population centers becoming uninhabitable over the coming decades. Some due

I'm less worried about current biodiversity than I am about the risk of significant population centers becoming uninhabitable over the coming decades. Some due to inundation, others because human bodies can survive high heat or high humidity, but not both a the same time. It seems potentially worthwhile to fight a figurative battle for stemming climate change in order to try and reduce the risk of setting off a chain of events that could lead to a literal war. That said, I suspect that fretting about space tourism also wouldn't make much of a dent. Maybe more than worrying about straws, but I bet we would get a lot more out of, e.g., allowing the real price of meat to rise back up to what it was 50 years ago.