The World Wide Fund for Nature (WWF) is an international non-governmental organization working on issues regarding the conservation, research and restoration of the environment, formerly named the World Wildlife Fund, which remains its official name in Canada and the United States. It is the world's largest independent conservation organization with over 5 million supporters worldwide, working in more than 100 countries, supporting around 1,300 conservation and environmental projects. WWF is a foundation, in 2010 deriving 57% of funding from individuals and bequests, 17% from government sources (such as the World Bank, DFID, USAID) and 11% from corporations.

The group says its mission is "to halt and reverse the destruction of our environment"^{[citation needed]}. Currently, much of its work focuses on the conservation of three biomes that contain most of the world's biodiversity: forests, freshwater ecosystems, oceans and coasts. Among other issues, it is also concerned with endangered species, pollution and climate change.