A new study by Stanford University researchers have developed detailed plans for each state in the union to move to 100 percent wind, water and solar power by 2050 using only technology that’s already available. It is feasible, and cost effective, and doesn’t rely on dramatic energy efficiency changes, fossil fuels, or nuclear power. The proposal is straightforward: eliminate combustion as a source of energy, because it’s dirty and inefficient. Power all vehicles by electric batteries or by hydrogen, where the hydrogen is produced through electrolysis rather than natural gas. High-temperature industrial processes would also use electricity or hydrogen combustion. Allow existing fossil-fuel plants to age out and be replaced with renewable power sources.