Solar energy is cheap, plentiful and low impact. The only downside is finding a way of storing the energy until it needed by consumers. Molten salt batteries are not new, but they are now being refined.

The first thing you see of the Crescent Dunes Solar Energy Facility, and you can be miles away, is a light so bright you can’t look directly at it. This sits atop a 640-foot cement tower, rising from the flat, empty Nevada desert around the halfway point on the highway from Reno to Las Vegas. The tower’s surrounded by a nearly two-mile-wide field of mirrors that send shimmering beams of light into the sky. Travelers sometimes ask whether they’ve driven […]

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