write the five principle of solid waste managementand explain
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The 7 R's: Refuse, Reduce, Repurpose, Reuse, Recycle, Rot, Rethink .....
Solid waste was already a problem long before water and air pollution issues attracted public attention. Historically the problem associated with solid waste can be dated back to prehistoric days. Due to the invention of new products, technologies and services the quantity and quality of the waste have changed over the years. Waste characteristics not only depend on income, culture and geography but also on a society's economy and, situations like disasters that affect that economy. There was tremendous industrial activity in Europe during the industrial revolution. The twentieth century is recognized as the American Century and the twenty-first century is recognized as the Asian Century in which everyone wants to earn ‘as much as possible.’ After Asia the currently developing Africa could next take the center stage. With transitions in their economies many countries have also witnessed an explosion of waste quantities.
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The hierarchy usually adopted is (a) waste minimisation/reduction at source, (b) recycling, (c) waste processing (with recovery of resources i.e. materials (products) and energy), (d) waste transformation (without recovery of resources) and (e) disposal on land (landfilling).
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