GEO-GRAPHIC: A day in the life of solar energy.This graphic follows the path of solar radiant energy as it changes form and works on matter.
(1. Evan Kafka/Getty Images; 2. Marco Brivio/age fotostock/GettyImages; 3. U.S. Dept. of the Interior-Bureau of Reclamation; 4. REBECCA COOK/Reuters/Newscom)
