WATER POLLUTION
• Parasitic worms (helminths). High levels of pathogens may result from inadequately treated sewage discharges. In developed countries, older cities with aging infrastructure may have leaky sewage collection systems (pipes, pumps, valves), which can cause sanitary sewer overflows. Pathogen discharges may also be caused by
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SOLID WASTE MANAGEMENT - LU
www.geo.lu.lvBiogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal dung, and kitchen waste can be converted into a gaseous fuel called biogas. Biogas originates from biogenic material and is a type of biofuel.
ENVIRONMENTAL POLLUTION
www.geo.lu.lvWater is considered to be polluted if certain substances or physical factors affect the quality of water and functioning of ecosystems and, as a result, the use of water for particular purposes is restricted. Classification of the water pollution sources: WATER POLLUTION 19 point source pollution non-point source pollution
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