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wastesubstances or objects that no longer have a use and are disposed of (1) |
waste hierarchya guide to the best ways of treating solid waste that ranks them in order of preference (1) |
waste managementcollection, treatment and disposal of solid waste (1) |
waste stabilisation pondsseries of ponds where natural biological and physical processes remove pollutants from wastewater (6) |
willingness to payextent to which people are motivated to pay for improved sanitation and waste management (13) |