About Sierra

The Sierra Club is America's largest and most influential grassroots environmental organization, with more than 2.4 million members and supporters. In addition to helping people from all backgrounds explore nature and our outdoor heritage, the Sierra Club works to promote clean energy, safeguard the health of our communities, protect wildlife, and preserve – more... 

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Headquarters
San Francisco California, United States
Employees
501 to 1,000
Links
Sierra website