2. Introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem Definition of POLLUTION Contaminate = to make impure, infected, corrupt, etc. by contact with or addition of something;
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4. One type of pollution can lead to other types of pollution = as the physical environment is INTERCONNECTED
9. Natural events Human Activities Causes of air pollution Motor vehicles – carbon monoxide, nitrous oxide Industries, Incinerators (Treat waste) Volcanic eruption - Produce ash and dust Forest fires – ash and smoke Q : Which human activity will also cause forest fire?
10. Acid Rain Withered trees Effects on Air pollution – 1. Environment Smog (Smoke + sulphur dioxide) Haze (Dust and smoke particles in air) Visible corrosion
11. Visibility affected in traffic (Safety issue) Eg Cars, aeroplanes Individual health problems (respiratory) Eg Asthma, Bronchitis Effects on Air pollution 2. Health 3. Traffic
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14. Causes of water pollution Discharging industrial waste Oil Spills (hard to clean up) Dumping garbage and raw sewage Seepage from landfill
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22. Improper disposal of waste Farming practices = Fertilizers & pesticides (results in both water and land pollution) Causes of land pollution
26. Write a complaint letter in pairs. Include the following : The extent of problem, causes and solutions Housing board Soil association Water treatment board Air traffic control authority To Problem From Pollution Noisy neighbour Resident Noise Spread of diseases Farmer Land Contaminated water, oil spills Fisherman Water Haze and smog Pilot Air
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28. Measures 3. National -Laws & regulations (control amount of pollutants within safety limits), alternative source of energy, proper waste disposal methods (landfills, incinerators) Case Study : Singapore’s Semakau landfill - Careful planning of the island led to its amazing biodiversity - Semakau maintains a sustainable solid waste management system and a wealth of natural habitats - Biodiversity includes various species of birds, sea animals and insects 4. Individual - RRR - Education
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30. Start the pledge with “We, the citizens of Singapore, pledge to reduce pollution by … “
31. Start the pledge with “We, the Government of Singapore, pledge to reduce pollution by … “
32. Start the pledge with “We, the representatives of the world, pledge to reduce pollution by … “
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