The thing stopping us from having a sustainable future is Capitalism. It's that simple. We can have capitalism, or we can have a sustainable future. We can't have both.
We have nearly all the technologies necessary for a sustainable future (we're missing zero carbon concrete, and ammonia). We just have yet to roll them out and replace the old carbon heavy version.
To quote a certain sci fi author. The future is here, just not evenly distribute
2/n