Bloomberg
Tomorrow morning, Europe will go dark. As the moon sweeps across its face, the sun will be hidden for about three hours in an eclipse that will allow only 20 percent of its usual light to reach the Earth. It's a reminder that, in the drive to switch more of the world to renewable energy sources, solar panels don't light up when it's dark, and turbines don't rotate when the wind doesn't blow. The sea, though, is constant, reliable -- and scandalously underutilized.
