Landfill waste refers to the materials that are discarded and sent to a landfill, which is a designated area for waste disposal. This waste can include everyday items like food scraps, plastic containers, and old furniture. When these materials are buried in the ground, they can take many years to decompose, leading to environmental concerns. Landfills are designed to manage waste safely, but they can produce harmful substances, such as methane gas, which contributes to climate change. Proper waste management practices, like recycling and composting, can help reduce the amount of landfill waste generated and minimize its impact on the environment.