What's needed for solar to power the world

Taming the Sun book cover
Cover of Taming the Sun; a Council on Foreign Relations book published by the MIT Press.

Solar power expert Varun Sivaram is getting lots of buzz for his just-published book Taming the Sun: Innovations to Harness Solar Energy and Power the Planet.

Why it matters: Sivaram warns that absent major innovations, solar's current boom will hit a ceiling that's far below its potential to fight climate change and provide affordable energy worldwide.