Please review & show me errors I made in this essay.
The author warns that invasive plants harm both native plants and animals, and the speaker asserts negative effects of garlic mustard which is an invasive species.
The author states that invasive plants are becoming problem for native species; gardeners brought nonnative plants from other places and planted them for food and medicine because of their hardy, drought-resistent properties, and their beauty. They grow aggressively and widly when living in a nappropriate environment. Consequently, they thrust out native species by shading, competing with vines, or depleting nutrients. Native plants and animals are decrease significantly and ecological system may be destroyed.
The speaker supports the reading passage by describing garlic mustand's threating to native spring-blooming plants as well as animal. Garlic mustard spreads strongly and strangles light, nutrients and space. In addition, white butterfly is affected due to its food sources are reduced and garlic mustard produces chemical toxic to its eggs. In nineteenth centery, they appeared in Long Island; now they spread over easten and mid-western of Amecica.