Summary of topic 5.1
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Pollution can be natural or anthropogenic and can harm air, water, and soil. There are two main types of pollution sources: point sources, which can be pinpointed on a map and may have a huge local impact, and non-point sources, which are more dispersed and difficult to manage. Major pollution sources include industrial waste, agricultural waste, mining and quarrying, sewage sludge, and demolition and construction waste. The effects of pollution can include death, reduced public health, and decreased water and soil quality. It is important to address the root sources of pollution rather than just the symptoms.
Summary of topic 5.1
- 1. Topic 5 Pollution Management 5.1 Nature of Pollution
- 2. Pollution • ‘The contamination of the Earth and atmosphere to such an extent that normal environmental processes are adversely affected. Polluted elements are disagreeable, toxic, harmful and/or objectionable.’ • It may be: – – – – Natural (e.g. volcanoes) Anthropogenic (e.g. release of sewage) Deliberate or accidental May harm the quality of air, water or soil
- 3. Point Source Pollution • Discrete sources of pollution which can be pinpointed on a map • May be more easily treated and managed, but may be have a huge impact on the local environment – Chernobyl disaster, 1986 – Bhopal disaster – A single sewage outfall
- 4. Non-point Source Pollution • Dispersed sources of pollution • Not possible to pinpoint a single origin • Not easily managed – Car pollution in a city – Numerous industries in a single area
- 5. Major Sources of Pollution domestic and commercial waste (9%) demolition and construction waste (8%) sewage sludge (8%) mining and quarrying (27%) dredging waste (11%) industrial waste (17%) agricultural waste (20%)
- 6. Effects of Pollution • • • • Death in serious cases Decreased level of public health Reduced water quality and availability Reduced soil quality It is important that sources of pollution are tackled rather than the symptoms http://www.youtube.com/watch?v=iyckJOd9A es&list=PL51D60810437D8150