The announcement today that Google has invested $75 million in a 50MW wind farm in Rippey, Iowa, bring the company just short of $1 billion in investments in green energy projects. Google says this project brings Google's committed investment to the renewable energy sector to more than $990 million. The Iowa wind farm is expected to produce enough energy to power over 15,000 Iowa homes. The project, which is now in operation, uses turbines produced by Nordex USA at their Jonesboro, Ark. facility. Click here to check out other green Google projects.