Texas has more wind-generation capacity than the grid can handle. Proposed new transmission lines could help Texas deliver its wind energy to cities in the East and West.
Turbines submerged along the Mississippi and its tributaries have been proposed as a way to generate hydroelectricity without dams.
The Southwest is a solar-power hotbed. To supplement fossil fuel plants, long-distance transmission lines stretch from the Mojave Desert, which has plenty of sun.
Our electricity today is far from clean. Most of it comes from burning fossil fuels, about half of that from coal. Kerosene, natural gas, and propane are other nonrenewable sources.
Other energy includes biomass and geothermal.