Google will operate with 100% renewable energy by 2017 at a global level

Google is not the first colossus which is focused on renewable sources of energy for the operation of the infrastructure, however, is …
the first who dares to announce that from 2017 will be based solely on these for the support of data centers and offices all over the world!
The announcement was made by Urs Hölzle, vice president of infrastructure of Google, who points out that in order to achieve the goal you will need to buy electricity that will be derived from the exploitation of solar radiation and air.

In addition to the environmental benefits, Google will save you with this way, the important amounts required for the daily operation of all infrastructure, as the cost of solar and wind power has fallen by 80% and 60%, respectively.
Source