Many of the mangrove swamps crucial to the country's fisheries and wildlife have been destroyed. The loss of wildlife habitat and the negative environmental effects of logging and mining industries have caused a decline in biodiversity. In 2001, 55 species were listed as threatened in Cambodia, including 23 species of mammals. In addition, the pollution and contamination of streams and lakes has made much of the country's fresh water unsafe. Only 30 percent (2000) of all Cambodian people have access to safe, drinkable water, and only 17 percent (2000) have access to sanitation.