If the growth is slowed in the meantime...
Economic collapse is a well-known solution for greenhouse gas issues. It worked for Russia to the point where they were selling credits quite successfully. Until that market fell flat.
Open ranchland ten minutes from downtown is great, if you have a job. Others might think that a factory or office building would look pretty good there.
By the time the power is needed in DFW, it's going to be too late to build plants. As I said on another board, they'll probably "solve" the problem by buying power from areas that aren't so fussy about how it's produced.