[alas44]

Ideally, pre-industrial levels of CO2 ppm and stabilization of planetary scale changes (ocean dilatation, melting of glaciers etc). Because of inertia at this scale, for the second part we are already in trouble, even if we were able to magically stop emitting CO2 today

[mhuffman]

>Ideally, pre-industrial levels of CO2 ppm and stabilization of planetary scale changes

I don't see how this is possible with our current population growth trajectory.

[robjan]

The global population is about to plateau and then start shrinking