U.S. Department of Energy video explains how solar energy works. (credit US DOE)
Originally published at – http://learningenglish.voanews.com/a/solar-energy-explained/3429263.html
Post time: Jul-09-2017
Post time: Jul-09-2017
U.S. Department of Energy video explains how solar energy works. (credit US DOE)
Originally published at – http://learningenglish.voanews.com/a/solar-energy-explained/3429263.html