Schneider Electric's Schneider Home, an energy management system.
Courtesy of Schneider Electric

Corporate carbon footprints can be huge, but Schneider Electric’s energy-­management business works with 40% of the Fortune 500, helping massive clients reduce greenhouse-­gas emissions. “We start by helping them understand where they are,” says Steve Wilhite, senior VP of Schneider’s sustainability business. “That’s where a lot of consultants’ work ends, but not ours.” Last year, it helped Walmart accelerate adoption of renewable energy in the megastore’s supply chain, co­ordinating suppliers to buy into a 12-year wind-power contract. Schneider has also acquired a bevy of software and service providers to help reach its goal of saving clients 800 million tons of CO2 emissions by 2025.

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