It is quite simple - the answer to most problems like this is unlimited clean energy

And it doesn't matter how this is achieved

• renewable
• Thorium
• Fusion

Or a mix of all that 3...

It will be Fusion or potentially anti matter in 2050+/2100+

As soon as u have the clean energy u can undo every pollution if u want to. Capture CO2 from air ..

The only question is, how ugly it gets till we have this stage..and what is best way there