We have to qualify: climate change caused by human activity.
I don't know if we can prove that human activity has caused climate change but, if someone believes that to be true, then the simple solution is to close national borders to immigration and allow populations to decrease in number (as is already occurring in virtually all first-world-countries).
Fewer people; less climate change due to human activity.
Then we will need to import people from Central America and the Middle East to do the jobs Americans won’t do. /sarc