To do anything now, if it would even work at this stage, would take collective human action on a scale we have never even come close to achieving in the history of our species.
Generally speaking, we can't comprehend complex macro problems and even those of us who do accept that human-driven climate change is real and happening don't fully grasp the severity of it.
Those that do will simply never be able to effectively communicate it to jobbers who consider their own opinions to trump those of experts who have tirelessly researched this, and whose intellect and understanding of the crisis is completely, laughably beyond them.
Basically, we're effed. The only thing we can do is sit back and watch as we pulverise the lovely planet we've been given and listen to the denialist bellends say things like "bUt wE HaD a HeaTwAve iN NinEtEen DiCkItY FiVe". Have a lovely day