I agree these are huge challenges, and that climate activists are unrealistic in their expectations of how much people are willing to sacrifice or change. I wou

I agree these are huge challenges, and that climate activists are unrealistic in their expectations of how much people are willing to sacrifice or change. I would guess most climate activists take more than one flight per year, and certainly I do as someone who is concerned about climate (in non-COVID times.) For this reason, I really think technology has to be used to solve these problems. EVs, public transit, and high-speed rail where it makes sense are very straightforward answers for many things. There is also low-hanging fruit like insulating buildings, and switching buildings to use electricity instead of natural gas. In the US, all of these could be accelerated mostly with government subsidies. There aren't really any major technical hurdles to adopting them right now. Beyond that, I think we have to have carbon capture, and carbon-neutral biofuels. That would enable us to continue flying and eating meat. Hopefully lab-grown meats also pan out in the coming decades or so.