The United States has over 3,000 active landfills and 10,000 closed landfills. Landfills are necessary for the proper disposal of solid waste. They reduce the amount of waste that makes it into the environment, help to prevent disease transmission, and keep communities clean. However, landfills still have significant environmental and social impact. While landfills are a societal necessity, there are practices that can reduce the reliance on landfills and decrease their effects on the biosphere.