[H8crilA]

I imagine there's enough capital to take over the divested amounts. Warren Buffett has no trouble investing in oil (e.g. the recent Occidental/Andarko merger, he got some juicy preferred shares out of that). And I'm sure he's not alone.

Taxes/limits, we need that on carbon. The economic status quo on the subject is also the most obvious response: pay for the externality you're causing when burning carbon. EU's limits system (cap-n-trade) is already there and has been for many years, can be plugged into a global CO2 emissions market. This should eventually extend to cars, airplanes, ships, steel, concrete, home heating, whatever - even the farting cows.

Either that or solar geoengineering.