The list is led by Intel Corporation, PepsiCo, Kohl’s Department Stores, Dell Inc., Whole Foods Market, The Pepsi Bottling Group, Inc., Johnson & Johnson, U.S. Air Force, Cisco Systems, Inc. and the City of Houston.

"Green power" is generated from renewable energy resources such as solar, wind power, geothermal, biomass, biogas, and low-impact hydropower.

The USA’s top 50 purchasers are buying more than 11 billion kilowatt-hours (kWh) of green power annually, equivalent to the carbon dioxide emissions (CO₂) that would be produced from the electricity use of more than 1.1 million average American homes.

For the second year in a row, Intel Corporation is the nation’s largest single purchaser of green power with purchases of more than 1.3 billion kWh of green power per year. This corresponds to CO₂ emissions from the electricity use of nearly 130,000 average American homes.

Kohl’s, which more than doubled its green power purchase, secured a No. 3 spot on the National Top 50 list. Wal-Mart Stores, Inc., Dannon, Sony DADC and Motorola for the first time appeared on the National Top 50 list securing the No. 15, No. 33, No. 40 and No. 44 spots, respectively.

EPA’s Green Power Partnership works with more than 1,000 partner organisations to voluntarily purchase green power to reduce the environmental impacts of conventional electricity use. Overall, EPA Green Power Partners are buying more than 16 billion kWh of green power annually, equivalent to the CO₂ emissions from electricity use of more than 1.5 million American homes.