It would be difficult to overestimate the impact that corporate procurement of renewable energy, primarily through power purchase agreements (PPAs), has had on the overall renewable market. In less than a decade, renewable energy created from corporate PPAs went from zero to more than 13 gigawatts in the U.S. alone. Microsoft is one of the largest players in this market, beginning with a 110-megawatt wind project in Texas in 2013 to a portfolio of more than 1.2 gigawatts in six states and three continents.