In 1979, in the throes of the U.S. energy crisis, then President Jimmy Carter addressed the nation as he installed 32 solar panels designed to use the Sun’s energy to heat water. He told the country, “A generation from now, this solar heater can either be a curiosity, a museum piece, an example of a road not taken, or it can be just a small part of one of the greatest and most exciting adventures ever undertaken by the American people.”