When people use things like aluminum cans, glass bottles, or paper, they have two choices: throw them in the trash or recycle them. Throwing them in the trash means they will go into a landfill, which will ultimately mean more landfills. Landfills are toxic and thus dangerous to the environment. In addition, it means more natural resources will be needed to make more cans, paper, and bottles, and that will also contribute to air and water pollution. Recycling these objects means that their materials will be used again, reducing the need for cutting down trees or mining for materials to make cans. In addition, programs exist that pay people to recycle many of the things that they use, including aluminum cans, glass bottles, cell phones, and some types of scrap metal. People can also reuse other things, like using empty boxes to send things in the mail or empty plastic food containers for storing paperwork or tools. All of this reduces the need for making new landfills.