Paragraph 4: Endangered Animals

Exist some reasons that are causing endangered animals. One cause is the pollution because animals can not live in a polluted environment and they die. Other cause is hunting because hunters kill animals to obtain money with their body parts for example with the ivory of elephants. Finally, the last cause is the destruction of natural environment because people build cities, towns, etc in natural areas. John Smith, a famous ecologist, sees that the 40% of animal species are endangered. These are the main problems that are cause the extinction of some species of animals.