>>1531200Bullshit. The earth goes through temperature swings all the time. Even if this change is happening quicker than normal, as long as there is good habitat, life will largely be able to adapt accordingly. On the other hand, humanity has thrown all sorts of unprecedented problems at life, such as previously nonexistent chemical compounds in the form of plastics, fertilizers, herbicides, and pesticides, and massive destruction and fragmentation of habitat in the form of urban hellscapes, highways, suburbia, dams, clear-cutting, etc. Additionally, these problems can largely be attacked effectively at a local level. Limit fertilizer use in this basin, and algae blooms will stop in this lake. Prevent development of this prairie, and these species will proliferate there. If you want to cut global CO2 levels, you'd need to get every single country on board. Good luck stopping China and other developing nations.
If my options are to live in a place where the climate is consistent with how it was 300 years ago but it's developed beyond belief with all sorts of chemical use or to live in a place with prime habitat but uncertain about its climatic future, I'll take the latter every time.