Microsoft is one of the big tech companies that have announced going green

Wind energy to power Microsoft's data centres

US computer software company Microsoft has signed a 20-year power purchase agreement for wind energy in Texas in a bid to become carbon neutral.

According to a blog post on the company’s website, Microsoft  will start buying energy to power its large data centre in San Antonio from RES Americas' 110-megawatt Keechi wind project, which is under development near Jacksboro, about 113 km northwest of Fort Worth.

RES Americas is a unit of privately held, UK-based renewable energy developer RES. RES will begin construction of Keechi in early 2014 and will begin delivering power in 2015. The wind farm will include 55 wind turbines manufactured mostly in Colorado by a unit of Danish wind turbine manufacturer Vestas Wind Systems.

Microsoft said in the blog, the US Environmental Protection Agency has recognized the company as the second largest purchaser of green power in the United States.

The company said the Keechi wind power purchase "will certainly not be our last."

Microsoft is not alone among technology companies buying renewable power. Google, Apple, Facebook, Rackspace Hosting or Salesforce have all committed to powering their data centres in a greener way, increasing the proportion of renewable energy used.

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