Change zoning and a bunch of other regs to promote Netherlands style building and transport, rather than the ugly arse parking lot carbonized death culture we have now, invest heavily in developing cost effective nuclear (get that regulator out of the way of change), invest in fusion and reprocessing nuclear fuel research for medium to long term, start pumping out small nuclear plants from factories that can be put on the grid at strategic places to limit transmission build out need and limit losses of one of nuclear design we have now by going mass produced, not worry so much about our co2 outout for the next 3 decades it takes us to build all this, then start capping carbon out put hard