I agree entirely, Gregory. While I have great respect for Mann, Hansen’s argument seems more plausible in light of chaos and complexity theory, as borne out by the unpredicted acceleration in extreme weather events and heat waves all over the planet during the past few years. And the carbon extraction tax and dividend approach would not only provide a strong incentive to for corporations to shift to renewables, but would also redistribute wealth equitably; whereas cap-and-trade would be just a shell game, enabling the super-rich to keep all the profits to themselves.