The Clean Energy Group is a coalition of electric utilities and electric generating companies that share a commitment to responsible environmental stewardship. Among the members are some of the largest electric and natural gas utilities, serving over 33 million electric customers and over 35 million natural gas customers. They are also some of the nation's largest generators of electricity, with nearly 213,000 megawatts (MW) of generating capacity throughout the U.S., which represents approximately 20 percent of total U.S. generating capacity.