The main causes of endangered animals' troubles are the loss of habitat due to human activities like deforestation, the introduction of invasive species, and overhunting for trophies and fur. Habitats are often destroyed when humans cut down forests and release pollutants. Climate change also damages habitats. Invasive species threaten native populations when they outcompete them for resources. Additionally, some humans kill vast numbers of animals not for survival or defense, but solely for products like ivory horns and fur, endangering many species. Conservation groups like the World Wildlife Fund work to protect endangered animals and habitats.