I think - a cool way to reverse climate change and also burst humanity into a new age of amazingness - is if we invent nano-robots and/or genetically engineer some artificial bacteria or algae, etc - to suck carbon out of the air and chemically spin it into strands of diamond. And we use that diamond rope to build space elevators. We could turn the Earth into a wheel with diamond spokes and build solar-powered cities in space with diamond hulls and diamond transport tubes. Build gigantic diamond mirrors to control how much sunlight arrives on Earth.

We could also dispose of our poisonous waste by flinging it into the Sun, for free (because space elevators use centripetal force to launch stuff - you don't need rockets).

And we could also just simply remove the root cause of the Earth's problem ... ie. us.

Let's go & live in Space!!!

OK Scientists - hurry up and get inventing!!