https://www.scientificamerican.com/article/cities-look-to-ldquo-virtual-power-rdquo-to-reach-climate-goals/ > Corporate America has emerged as a leading buyer of renewable energy in recent years. Now, U.S. cities are getting in on the act. > Boston Mayor Martin Walsh announced an initiative last week aimed at bolstering municipal renewable procurements nationwide. By working together to purchase large amounts of renewable energy, Walsh hopes cities can cut the costs of wind and solar, stimulate the economy, and meet the terms of the Paris climate accord.