In the twenty-first century, we will have to turn to zero-carbon energy—wind, solar, hydro, geothermal, and ocean—to avoid the great risks of human-induced global warming caused by the fossil fuels, and geographical advantages will shift once again.

We can proceed fairly fast with the displacement of coal-fired electricity by natural gas (when produced and transported without significant methane leakage, it has a substantially lower carbon intensity than coal) and by expanding solar and wind electricity generation. We can move away from SUVs and accelerate mass-scale deployment of electric car