Google will use 100% renewable energy in 2017

Google today said it will be able to power all of its global data centers and corporate offices from 100% renewable energy in 2017, a goal the company has been working toward for years.
Six years ago, Google began signing long-term contracts to buy renewable energy directly from solar and wind farm suppliers. The company's first contract was to purchase all the electricity from a 114-megawatt (MW) wind farm in Iowa.
Last year, Google purchased another 842MW of renewable energy, nearly doubling