Center for Climate and Energy Solutions
|This article relies on references to primary sources. (January 2010)|
The Center for Climate and Energy Solutions (C2ES) transitioned from the Pew Center on Global Climate Change in November 2011 under the leadership of its president, Eileen Claussen. The Pew Center was established in May 1998 as a non-profit, non-partisan, and independent organization involved in the effort to address global climate change. The Pew Center was led by Eileen Claussen, the former Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs. Its board of directors included Theodore Roosevelt IV, the new board chair of C2ES, and Klaus Topfer.
Highlighting the broad mix of approaches required to tackle the climate challenge, the Pew Center produced nearly 100 peer-reviewed reports and a broad collection of white papers and briefs by noted climate experts covering a range of critical topics including economics, environmental impacts, policy, science, business, technology and solutions. The Pew Center regularly testified before the United States Congress and met with others to share ideas for addressing climate change. The Pew Center also was engaged with governments and business in exploring options for a post-2012 international climate agreement
The Pew Center's Business Environmental Leadership Council (BELC) became the largest U.S.-based association of companies committed to advancing both policy and business solutions to climate change. The Council started with 13 members and includes more than 40 mainly Fortune 500 companies with combined revenue of over $2 trillion and nearly 4 million employees. The Council now operates as the C2ES Business Environmental Leadership Council. The Pew Center also served as a founding and active member of the U.S. Climate Action Partnership (USCAP), an influential business-NGO coalition calling on Congress to establish a mandatory national climate policy.
The Pew Center has also partnered with several companies, including Entergy and Alcoa, for the Make an Impact program. The program is designed to help individuals take action to reduce their carbon footprints and includes a custom-built carbon calculator.
The 2009 Global Go To Think Tank Rankings, a global survey of hundreds of scholars and experts conducted by the University of Pennsylvania, named the Pew Center on Global Climate Change as the world's "top environmental think tank." 
A nonprofit, tax-exempt organization under Internal Revenue Code section 501(c)(3), the Pew Center was supported by a range of individuals and charitable organizations, primarily the Pew Charitable Trusts.