Interesting discussion here, Summers, Lomborg, Tabarrok, and Cowen on climate change.
My thoughts are that you need a carbon tax and a payout to those who net remove CO2 from the air then you could reach equilibrium.
But, could rationally ignorant voters ever get the politicians to properly implement such a scheme, not until AGW brings temperatures to a level where negative effects are obvious. So sit back and enjoy milder winters for now.
Another possibility would be geoengineering measures to cool the planet.
I am not worried though because I think that removing co2 from the air or cooling the planet will not be very expensive.
So don’t worry be happy.