Technology isn't going to save humanity. Greatly reducing population size by limiting reproduction is the only chance for a long future for humans. Thats the most direct path, but also at odds with all of our forms of government and economics. China couldt afford to keep doing it and they understand this. Its the same with the earths ecology. We would need a massive enlightening and there are far too many material and lifestyle choices and campaigns to sway people away from our staus quo. Humanity is doomed by human greed and jealousy, it always was. But thats fine, once you come to terms with it, and if you caught it before having kids, its a pretty freeing understanding.