A global campaign to promote 100% renewable energy use in the business world means more Silicon Valley giants are now investing in solar and wind electricity

Tech giants are jockeying to be the first to hit a 100% renewable energy goal. Google, which has invested in solar and wind energy for a decade, intends to get there by 2017.

Google is the largest corporate buyer of renewable energy, and plans to buy enough wind and solar energy to offset all the electricity used by its 13 data centers and offices in 150 cities worldwide, the company said Tuesday.

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