The Global Wetlands Map plots the distribution of wetlands, histosols - or peaty soils - and their carbon stocks around the world. Visitors can freely access the data via the online map or by download, while registered users can verify data and add their own. The initiative comes from the Sustainable Wetlands Adaptation and Mitigation Program (SWAMP), a collaborative effort between the Center for International Forestry Research (CIFOR) and the United States Forest Service, supported by the United States Agency for International Development (USAID).