There are thousands of plant and animal species that are endangered worldwide, including the Siberian tiger, snow leopard, and green pitcher plant. Habitat destruction, hunting, pollution, and other human-caused threats are driving more and more species to extinction. The rate of extinction is estimated to be 1 species every 100 years. Some ways to help endangered species include recycling, planting native plants, donating to conservation organizations, and contacting government representatives about environmental issues.