From RealClearPolitics :

Unless we can replace coal or neutralize its CO2 emissions, curbing greenhouse gases is probably impossible. [emph. added]
[snip]
[T]here are no instant solutions, and a political dilemma dogs most possibilities. What’s most popular and acceptable (say, more solar) may be the least consequential in its effects; and what’s most consequential in its effects (a hefty energy tax) may be the least popular and acceptable.