Solar energy has plunged in price—where does it go from here?

Enlarge / LONG ISLAND SOLAR FARM (credit: Brookhaven National Lab) In the year 2000, the entire world had roughly four Gigawatts of solar power capacity installed, and it didn’t seem to be going anywhere fast. In 2002, the International Energy Agency forecast suggested that, by 2020, global solar capacity would still be hovering at around […]