Yes, the statement that switching off coal-fired power plants etc. is only true at the margin. However, for the OP’s question, it seems that the sign of “marginal social benefit—marginal social cost” seems crucial.
Yes, the statement that switching off coal-fired power plants etc. is only true at the margin. However, for the OP’s question, it seems that the sign of “marginal social benefit—marginal social cost” seems crucial.