IEEE SPECTRUM: What it would really take to reverse climate change. Actually, nothing, since there is no global warm.... oops, sorry, climate change.

But even if there were global warming, reversing it would be impossible using any currently known technology.

The only sensible statement in the entire article is this: "[R]ather than depend on politicians’ high ideals to drive change, it’s a safer bet to rely on businesses’ self interest: in other words, the bottom line."