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People who earn their living by collecting and sorting garbage and selling them for recycling, Payatas in Manila, Philippines.

Waste (also known as rubbish, trash, refuse, garbage, junk, and litter) is unwanted or useless materials.

Waste is linked to people development. Litter refers to waste disposed of improperly.

Definitions [link]

[edit] Environment Programme According to the Basel Convention:

"Wastes are materials that are not prime products (that is products produced for the market) for which the generator has no further use in terms of his/her own purposes of production, transformation or consumption, and of which he/she wants to dispose. Wastes may be generated during the extraction of raw materials, the processing of raw materials into intermediate and final products, the consumption of final products, and other human activities. Residuals recycled or reused at the place of generation are excluded."^[1]

Vegetable waste being dumped in a market in Hyderabad

Under the Waste Framework Directive (European Directive 75/442/EC as amended), the European Union defines waste as an object the holder discards, intends to discard or is required to discard.

Types [link]

There are many waste types defined by modern systems of waste management, notably including:

Agobox; Bio-medical Waste

• Municipal Waste includes Household waste, Commercial waste, and Demolition waste
• Hazardous Waste includes Industrial waste
• Bio-medical Waste includes Clinical waste
• Special Hazardous waste includes Radioactive waste, explosives waste, and Electronic waste (e-waste)

Reporting [link]

There are many issues that surround reporting waste. It is most commonly measured by size or weight, and there is a stark difference between the two. For example, organic waste is much heavier when it is wet, and plastic or glass bottles can have different weights but be the same size.^[2] On a global scale it is difficult to report waste because countries have different definitions of waste and what falls into waste categories, as well as different ways of reporting. Based on incomplete reports from its parties, the Basel Convention estimated 338 million tonnes of waste was generated in 2001.^[3] For the same year, OECD estimated 4 billion tonnes from its member countries.^[4] Despite these inconsistencies, waste reporting is still useful on a small and large scale to determine key causes and locations, and to find ways of preventing, minimizing, recovering, treating, and disposing waste.

Costs [link]

Environmental costs [link]

Waste attracts rodents and insects which harbour gastrointestinal parasites, yellow fever, worms, the plague and other conditions for humans. Exposure to hazardous wastes, particularly when they are burned, can cause various other diseases including cancers. Waste can contaminate surface water, groundwater, soil, and air which causes more problems for humans, other species, and ecosystems.^[5] Waste treatment and disposal produces significant green house gas (GHG) emissions, notably methane, which are contributing significantly to global climate change.^[3]

Social costs [link]

Waste management is a significant environmental justice issue. Many of the environmental burdens cited above are more often borne by marginalized groups, such as racial minorities, women, and residents of developing nations. NIMBY (not-in-my-back-yard) is a popular term used to describe the opposition of residents to a proposal for a new development close to them.^[6] However, the need for expansion and siting of waste treatment and disposal facilities is increasing worldwide. There is now a growing market in the transboundary movement of waste, and although most waste that flows between countries goes between developed nations, a significant amount of waste is moved from developed to developing nations.^[7]

Economic costs [link]

The economic costs of managing waste are high, and are often paid for by municipal governments.^[8] Money can often be saved with more efficiently designed collection routes, modifying vehicles, and with public education. Environmental policies such as pay as you throw can reduce the cost of management and reduce waste quantities. Waste recovery (that is, recycling, reuse) can curve economic costs because it avoids extracting raw materials and often cuts transportation costs.^[9] The location of waste treatment and disposal facilities often has an impact on property values due to noise, dust, pollution, unsightliness, and negative stigma. The informal waste sector consists mostly of waste pickers who scavenge for metals, glass, plastic, textiles, and other materials and then trade them for a profit. This sector can significantly alter or reduce waste in a particular system, but other negative economic effects come with the disease, poverty, exploitation, and abuse of its workers.^[10]

Education and awareness [link]

Education and awareness in the area of waste and waste management is increasingly important from a global perspective of resource management. The Talloires Declaration is a declaration for sustainability concerned about the unprecedented scale and speed of environmental pollution and degradation, and the depletion of natural resources. Local, regional, and global air pollution; accumulation and distribution of toxic wastes; destruction and depletion of forests, soil, and water; depletion of the ozone layer and emission of "green house" gases threaten the survival of humans and thousands of other living species, the integrity of the earth and its biodiversity, the security of nations, and the heritage of future generations. Several universities have implemented the Talloires Declaration by establishing environmental management and waste management programs, e.g. the waste management universityproject. University and vocational education are promoted by various organizations, e.g. WAMITAB and Chartered Institution of Wastes Management.

See also [link]

Environment portal

	Book: Pollution
Wikipedia books are collections of articles that can be downloaded or ordered in print.

• Environmental dumping
• Fly-tipping
• Life cycle assessment
• List of waste types
• Litter
• Recycling
• Waste by country
• Waste collection
• Waste collection vehicle
• Waste converter
• Waste management

References [link]

External links [link]

Wikimedia Commons has media related to: Waste

Wikiquote has a collection of quotations related to: Waste

Look up waste or wastefulness in Wiktionary, the free dictionary.

• Waste at the Open Directory Project
• Resource Productivity and Waste at the OECD