The A is settled. Although the causes are both Carbon and Methane. The B) part of the question is far more interesting.
The commitments made at Paris which won't be met by anyone don't sufficiently reduce emmissions to prevent catastrophic warming. There isn't the political will anywhere to do it. And with Oil Prices where they are there is no economic incentive to do it either. The delta in cost to stop global warming increased significantly.
Geo-engineering solutions are about the only options that can realistically reduce warming on the timetable we need. No one likes them though.
The other side of it which I have not seen analysed is is preventing global warming actually a net good vs bringing people out of poverty with the use of cheap energy. Saving lives by investing in clean energy is a very expensive way to improve global standard of living.
|