Google, Facebook, General Motors and Walmart, along with over 300 other companies, launched the Renewable Energy Buyers Alliance (REBA) today, which REBA described as, "the largest group of corporate renewable energy buyers in the United States."

"The association aims to open energy markets and offer greater choice for corporate energy buyers, focusing on innovations in policy, markets and technology as well as educational training," REBA said

REBA said that it hopes to bring more than 60 gigawatts of new renewables online in the United States by 2025.

REBA said that the companies in REBA's leadership circle alone represent annual revenues of $1 trillion and over 1% of US annual electricity consumption (48 terawatt-hours).

"[S]ourcing clean energy should be as simple as clicking a button," said Michael Terrell, head of Energy Market Strategy, Google, and REBA's first board chair.

Membership is available to nonresidential energy buyers, clean energy developers and other service providers.

REBA was originally founded in 2014 as a partnership between four NGOs -- Rocky Mountain Institute, World Wildlife Fund, World Resources Institute, and Business for Social Responsibility.