I think there are more solutions — specially outside capitalism — but sadly in my humble opinion we are most likely not going to succeed in saving the climate after all. There's a great essay on the anarchist libraries called "Desert" about that.

According to studies, even though many will die, many other will stay alive and adapt, so climate change most likely won't lead to extinction of humanity. If it's really inevitable (actually it has started already in poorest places), perhaps it's not worth discussions — we'll see how real climate change was on practice. ヽ(´ー｀)ノ