Solar, wind, geothermal, wave and other forms of renewable energy could in fact power the world.At the same time, I frankly do not understand the EV advocate who touts the green-ness of his electric car, but it is plugging that EV into a lump of coal (that would be pretty much any EV owner in, for example, the U.S. state of West Virginia, where 98% of electricity comes from the burning of coal).