- On the Web:
- Geosciences LibreTexts - Waste Disposal (Oct. 24, 2026)
waste disposal
News •
-
What is waste disposal?
Waste disposal refers to the deposition of solid or liquid waste materials on land or underground that can pollute the soil and groundwater, harm public health, create unsightly conditions, and cause nuisances. Municipal solid waste, construction and demolition waste, and hazardous waste are the main waste materials that cause land pollution.
Once gathered, municipal solid waste can be treated to decrease the total amount of material requiring final disposal. This treatment alters the waste's form, making it simpler to handle, and can also recover materials or heat energy for recycling or reuse. Land disposal is the most common strategy for managing municipal solid waste. Refuse can be deposited in a sanitary landfill, which is designed to protect the environment and public health.
3 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
Why do we need to dispose of waste properly?
Proper waste disposal is essential for preventing environmental pollution, maintaining public health, and ensuring the well-being of communities. Improper waste management leads to unsanitary conditions, which can cause the spread of vector-borne diseases via rodents and insects. Waste materials can contaminate soil and groundwater, posing risks to both the environment and public health.
Modern techniques like sanitary landfills and secure landfills are designed to mitigate these risks by controlling harmful byproducts such as leachate and methane gas. The manifest system also helps to track and prevent hazardous waste from being dumped illegally. Furthermore, proper waste disposal is critical for the health and survival of both individual organisms and entire communities, as the accumulation of waste and poisonous substances can be destructive. Toxic wastes can result in significant economic costs, health problems, and damage to ecosystems.
5 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
What are common methods of waste disposal?
Common methods of waste disposal include recycling, composting, incineration, and land disposal in sanitary landfills. Recycling reprocesses waste materials into new products, while composting uses microbes to decompose organic waste, reducing its volume and creating a soil conditioner. Incineration reduces waste volume by burning it, sometimes recovering heat energy, and land disposal involves burying waste in carefully designed landfills that prevent environmental contamination.
5 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
How does recycling help in waste disposal?
Recycling aids waste disposal by recovering and reprocessing waste materials into new products. Recycling reduces the need for raw materials from increasingly scarce natural resources. It lowers the amount of solid waste in landfills, which are becoming more expensive to maintain. Recycling also reduces air, water, and land pollution caused by waste disposal. Municipal solid waste can be treated to reduce volume and weight, making it easier to handle and recover materials for recycling or reuse.
3 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
What problems can improper waste disposal cause?
Improper waste disposal can lead to significant harm to both human health and the environment. Hazardous wastes, including solids, liquids, and gases, can cause substantial damage if not properly managed during storage, transportation, treatment, or disposal.
Land pollution occurs when solid or liquid waste materials contaminate the soil and groundwater, creating unsightly conditions and threatening public health. Water pollution arises from the improper disposal of solid waste, such as garbage and electronic waste, which can leach harmful chemicals into water bodies, harming aquatic ecosystems and wildlife. Air pollution can result from burning waste to recover metals, releasing toxic gases and particles into the atmosphere.
6 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
How can communities improve their waste disposal practices?
To improve waste disposal practices, communities can implement several strategies:
- Promote Recycling: Communities can encourage recycling through source separation programs, where residents separate recyclables like paper, metal, glass, and plastic for collection.
- Improve Landfill Management: Communities should invest in sanitary landfills with impermeable liners and leachate collection systems to prevent soil and groundwater contamination. They should also ensure proper monitoring of groundwater around landfills.
- Reduce Waste Volume: Municipal solid waste can be treated to reduce its volume through methods such as sorting, shredding, and composting.
- Cut back on single-use plastics: Consumers can reduce plastic waste by using reusable water bottles and practicing effective recycling.
- Proper waste collection: Enclosed, compacting trucks can reduce the volume of waste, and optimized collection routes can improve efficiency.
- Address Land Pollution: Communities can remediate old waste sites and prevent illegal dumping to address land pollution.
4 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
waste disposal, the collection, processing, and recycling or deposition of the waste materials of human society. Waste is classified by source and composition. Broadly speaking, waste materials are either liquid or solid in form, and their components may be either hazardous or inert in their effects on health and the environment. The term waste is typically applied to solid waste, sewage (wastewater), hazardous waste, and electronic waste.
In industrialized countries, municipal liquid waste is funneled through sewage systems, where it undergoes wastewater treatment, or sewage treatment. This process removes most or all of the impurities from wastewater, or sewage, before they can reach groundwater aquifers or surface waters such as rivers, lakes, estuaries, and oceans. (For more information on sewage systems and treatment, see wastewater treatment.
Refuse, or municipal solid waste (MSW), is nonhazardous solid waste from a community that requires collection and transport to a processing or disposal site. Refuse includes garbage and rubbish. Garbage is mostly decomposable food waste, and rubbish is mostly dry material such as glass, paper, cloth, or wood. Garbage is highly putrescible or decomposable, whereas rubbish is not. Trash is rubbish that includes bulky items such as old refrigerators, couches, large tree stumps, or construction and demolition waste (e.g., wood, drywall, bricks, concrete, and rebar [a steel rod with ridges for use in reinforced concrete]), all of which often require special collection and handling. Refuse is often deposited in sanitary landfills—that is, pits or other sites sealed with impermeable synthetic bottom liners where waste is isolated from the rest of the environment. (For more information on the treatment of solid wastes, see solid-waste management.)
" height="20" alt="HEW Logo">
Some forms of solid and liquid waste are classified as hazardous because they are harmful to human health and the environment. Hazardous wastes include materials that are toxic, reactive, ignitable, corrosive, infectious, or radioactive. Toxic waste is essentially chemical waste from industrial, chemical, or biological processes that can cause injury or death when it is either ingested or absorbed by the skin. Reactive wastes are chemically unstable and react violently or explosively with air or water. Infectious wastes (such as used bandages, hypodermic needles, and other materials from medical and research facilities) are materials that may contain pathogens. Radioactive wastes (such as spent fuel rods containing fissionable materials used in nuclear power generation and isotopes of cobalt and iodine used in cancer treatment and other medical applications) emit ionizing energy that can harm living organisms. Hazardous wastes pose special handling, storage, and disposal challenges that vary according the nature of the material. (For more information on how these materials are treated, see hazardous-waste management.)
Electronic waste, or e-waste, is electronic equipment that has ceased to be of value to users or that no longer satisfies its original purpose as a result of either redundancy, replacement, or breakage. Electronic waste includes both “white goods” such as refrigerators, washing machines, and microwave ovens and “brown goods” such as televisions, radios, computers, and cellular telephones. E-waste differs from traditional municipal waste. Although e-waste contains complex combinations of highly toxic substances (such as lead and cadmium in computers and cellular telephones) that pose a danger to health and the environment, which should be treated as hazardous materials with respect to their disposal, it also contains nonrecyclable parts that enter the municipal solid waste stream. Electronic devices also contain recoverable parts made of gold, silver, platinum, and other valuable materials, as well as recyclable materials (such as plastics and copper), that can be used to make new electronic items. For more information on e-waste, see electronic waste.