The Shimizu Corporation, a Japanese construction firm, has recently proposed a plan to harness solar energy on a larger scale than almost any previously proposed concept. Their ambitious plan involves building a belt of solar cells around the Moon’s 6,800-mile (11,000-kilometer) equator, converting the electricity to powerful microwaves and lasers to be beamed at Earth, and finally converting the beams back to electricity at terrestrial power stations. The Luna Ring concept, the company says, could meet the entire world's energy needs.
Something about this reminds us of Desertec: ambitious, expensive (though not in the same league as the €400bn Desertec), and with a bunch of big name vendors involved (apparently - there is no sign of it on either Mitsubishi’s or IHI’s websites). It’s also a long way off and far from certain.