As we are accustomed to a life full of modern conveniences, it is important to remember that human survival always depends on the natural diversity of the planet. Pennsylvania has 25,000 species of plants and animals, of which more than 2,100 are native (IConserve, 2007). It is essential to appreciate the sustainable use of these natural resources that influence the economic health of our great state and the quality of life for all Pennsylvanians. However, there are many threats to the biodiversity of our home. Invasive plant species that crowd out native plant species pose a significant threat. Invasive plants are plants that grow aggressively, spreading and displacing other plants (Ball, 2002). Whether intentional or not, they are often introduced by humans. On the other hand, native plants are pants that existed in Pennsylvania before European settlement. Because they are intended to grow here, they are very beneficial to the environment as well as humans (Fell 1995). To preserve the health and natural beauty of Pennsylvania, it is essential to control the growth of invasive plant species while supporting the growth of native plant species. When Pennsylvania was first settled in the 1600s by William Penn, abundant plants covered about 90% of the land. state (IConserve 2007). All of these plants are considered native because they existed in the area before human settlement. Unfortunately, due to human interactions with nature, the landscape has changed significantly over time. Many plants that once defined Pennsylvania have been lost; however, this problem can be reversed to some extent. By 2000, five percent of Pennsylvania's native plant species were extinct and twenty-five percent were in danger from invasive papergrass species that control or destroy any invasive species. These plants are adaptable and grow well in a wide range of conditions and therefore have a much better chance of thriving. It is also important to use fertilizers in moderation, as high nitrogen often stimulates aggressive plant growth (Fell, 1995). Land management planning is also important. Weekly mowing is important for lawn care and weeding is important for gardens. Pennsylvania's grasslands should be mowed annually and forests should be monitored for the need to remove invasive plant species (Ball, 2001). Unfortunately, invasive plants cause problems not only in Pennsylvania, but across the country (Invasive Plants: Silent Invaders, 2004). ). It is essential that efforts are made to prevent this plant crisis from getting any worse..