Let me pose a thought experiment. Let's say, for the sake of argument, that none of us (as individual ppruners) actually know what is going on with the climate.
Let's say there are 2 possibilities. On one side, we have "climate change is induced by human-caused emissions of various kinds". On the other side we have "climate change is going to happen anyway or not happen at all".
The choice you are asked to make is between those two. Now base your actions on the safest choice to make. Either "do something, just in case" or "do nothing because it won't make any difference".
Worst case, in doing something you get your electric from a wind turbine and some solar panels, pay maybe a little more for it in the short term, but hey, you're loving a comfy western lifestyle so hey.
Worst case in doing nothing, quite a lot worse.
Why would you choose to do nothing?