We're on the verge of what was unthinkable even 10 years ago - solar and wind are as cheap as coal. For all our largely unsuccessful efforts to legislate and regulate clean energy, perfects the market will finally provide the definitive solution: Clean energy that's also the economic best choice. Now let's just figure out how to store it.
Thanks to technological advances and a ramp-up in production over the decade, grid parity—the point at which sources of renewable energy such as solar and wind cost the same as electricity derived from burning fossil fuels—is quickly approaching. In some cases it has already been achieved, and additional innovations waiting in the wings hold huge promise for driving costs even lower, ushering in an entirely new era for renewables.