Corporate clean energy is not just for internet and computer giants like Google and Apple anymore, as companies across a number of sectors opt to buy renewables. One of the latest is banking giant Goldman Sachs, which has announced its first clean energy procurement deal from a 68-megawatt wind project that will be built in Pennsylvania. When it commences operation in 2019, the wind project will cover all of Goldman Sachs’ energy needs, including offices and data centers, in the United States. Food giant General Mills also has announced a deal to buy 100 megawatts of power from a wind farm in Texas. As more companies enter the clean energy mix, tools are helping them refine their energy decision-making. Researchers at the Rocky Mountain Institute have released a software tool  that helps companies identify the lowest-cost and best places to buy clean energy. And because companies have relatively large energy footprints and hefty balance sheets, they can be aggressive in bargaining for clean energy deals. In fact, if they don’t get what they want, utilities are increasingly facing the reality that some firms might choose to defect from the grid altogether to buy clean energy from outside suppliers, as several casinos have done in Nevada.