Introducing a nonnative species into an environment can cause some unexpected problems to the habitat and to native species. Although some introduced species are beneficial, such as food crops, game animals and pets, others can have a negative effect on the environment. Fifteen percent of species introduced have become invaders causing devastation to farms, health hazards for humans, invasion of natural areas, and the replacement of native species. If a plant or animal is introduced to a new area with similar plants or animals it causes competition for food or space. One species can b…
