We don't "fix" jackshit.
Natural climate change has been going on ever since the earth was formed. Except for The Boring Billion climate change has been a frequent event.
Climate change has been the cause of 99% of all the species that ever lived on earth to become extinct.
There is absolutely no credible evidence that humans have affected the climate. All we have are a stupid non scientific correlation, shit in and shit out computer models paid for with Wacko research money and a lot of fraudulent and cherry picked data.
What we have to do is what all species have to do to survive climate change. We adapt. Just like our ancestors had to adapt to the Ice Age. Humans are good at adapting. We live in the both the warmest and coldest areas on the planet.
The last ten thousand years have been a time of really great climate for humans. It allowed us to go from a few hundred thousand people to eight billion. However, it ain't gonna last.
One of the days the last human will die. If we don't die from war, comet impact or a Chinese virus it will probably be because of climate change.