“We are like tenant farmers chopping down the fence around our house for fuel when we should be using Nature’s inexhaustible sources of energy — sun, wind and tide. … I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before we tackle that.”

— Thomas Alva Edison talking to Henry Ford and Harvey Firestone in 1931

What a great insight 70 years ago. What have we done with this so far?