Waste (also referred to as rubbish, trash, garbage, or junk) is unwanted or unusable material.
In living orgasms, waste is the unwanted substances or toxins that are expelled from them. More commonly, waste refers to the materials that are disposed of in a system of waste management Waste management is the collection, transport, processing, recycling or disposal, and monitoring of waste materials. The term usually relates to materials produced by human activity, and is generally undertaken to reduce their effect on health, the environment or aesthetics. Waste management is also carried out to recover resources from it. Waste.
Waste is directly linked to human development, both technologically and socially. The composition of different wastes have varied over time and location, with industrial development and innovation being directly linked to waste materials. Examples of this include plastics and nuclear technology. Some components of waste have economical value and can be recycled Recycling involves processing used materials into new products to prevent waste of potentially useful materials, reduce the consumption of fresh raw materials, reduce energy usage, reduce air pollution and water pollution (from landfilling) by reducing the need for "conventional" waste disposal, and lower greenhouse gas emissions as once correctly recovered.
Waste is sometimes a subjective concept, because items that some people discard may have value to others. It is widely recognised that waste materials are a valuable resource, whilst there is debate as to how this value is best realised.
There are many waste types defined by modern systems of waste management, notably including:
- municipal solid waste (MSW)
- construction waste and demolition waste Demolition waste is waste debris from destruction of a building. The debris varies from insulation, nais, electrical wiring, rebar, wood, concrete, and bricks. It also may contain lead, asbestos or different hazardous materials (C&D)
- institutional waste, commercial waste, and industrial waste Industrial waste is a type of waste produced by industrial activity, such as that of factories, mills and mines. It has existed since the outset of the industrial revolution (IC&I)
- medical waste (also known as clinical waste)
- hazardous waste U.S. environmental laws additionally describe a "hazardous waste" as a waste (usually a solid waste) that has the potential to: and radioactive waste Radioactive waste is a waste product containing radioactive material. It is usually the product of a nuclear process such as nuclear fission. However, industries not directly connected to the nuclear industry may produce quantities of radioactive waste. The majority of radioactive waste is "low-level waste", meaning it contains low
- hazardous waste U.S. environmental laws additionally describe a "hazardous waste" as a waste (usually a solid waste) that has the potential to:
- biodegradable waste Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be broken down by other living organisms. Waste that cannot be broken down by other living organisms may be called non-biodegradable
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