I think it is hard for most people, including me, to realize that recycling cardboard boxes, carpooling when convenient, and other such small lifestyle changes are not going to be enough to stop climate change.
As far as I can tell - and I am definitely not an expert in this - to stop climate change we’re going to need to do two things: stop having children and stop acquiring stuff.
Now, it’s easy for me to say don’t have kids - I don’t have any, I never wanted any, and I am long past child-bearing age. But I do understand how having kids is extremely important to most people. Sure people could have one kid instead of two, or delay having kids till their thirties, or support birth control availability, or support education of women (because that is correlated with having fewer kids), or any number of other changes - but is that enough? I don’t know. I suspect not. Aside from another and more deadly plague, what would it take in terms of reducing the global birth rate to reduce the human population by, say, 10% over the next 500 years?
As for acquiring stuff, well, let me start with a confession: I am a privileged, white, middle-class person living in the United States. I own my house and 6/10ths of an acre and live there by myself. I own a car. I routinely drive places just to go hiking and make iNat observations. I took two long plane flights this year to go birdwatching and iNatting in Arizona and Veracruz, Mexico. As much as I try to give away unneeded stuff, I still own a lot of Stuff.
People like me think nothing of buying a lot of clothes, a lot of food, a lot of entertainment, a bigger house, a fancier car, and so on. Sure, some people try hard to only buy used clothes or books, or they have a big vegetable garden, or they install solar panels or mini-splits, but is that enough? As with birth rates, what would it take to reduce the amount of Stuff that’s produced by even 10% over the next few centuries?
Well that was a long rant - sorry about that. As a (retired) conservation planner, though, I think about these things frequently, but I have no good answers. But just writing this out is making me think about what would happen if I tried hard not to buy anything for a month? I think that might be pretty hard, when I think about things like heat and electricity.