"What has to be done today is (1) large-scale conversion (weatherizing , etc.), (2) sharp change in transportation to greater efficiency, like high-speed rail, (3) serious efforts to move to sustainable energy, probably solar in the somewhat longer term, (4) other adjustments that are feasible. If done effectively, that might be enough to stave off disaster. If not, then we can give up the ghost, because there are no alternatives in this world, at least none that I've seen suggested."