Unit 9 Causes and effects of air pollution

Unit 9 Causes and effects of air pollution

Unit 9 Causes and effects of air pollution What causes air pollution? Nature Volcanoes emit large amount of gases and ash into the sky whey they erupt.

Unit 9 Causes and effects of air pollution What causes air pollution? Nature Carbon dioxide is emitted and the ashes are carried by wind over a wide area when forests catch fire.

Unit 9 Causes and effects of air pollution What causes air pollution? Nature Pollen from plants and trees is another pollutant from nature.

Unit 9 Causes and effects of air pollution What causes air pollution? Industries The burning of fossil fuels produce pollutants such as carbon dioxide and sulphur dioxide.

Unit 9 Causes and effects of air pollution What causes air pollution? Farming A lot of forests are being cleared for farming by burning. Carbon dioxide is released.

Unit 9 Causes and effects of air pollution What causes air pollution? Farming Methane is released from rice fields and cattle ranches. Cattle ranch

Unit 9 Causes and effects of air pollution Regions in the world most affected by air pollution N Amsterdam London Berlin Paris Cairo Beijing Tianjin Guangzhou Tokyo Osaka Shanghai Hong Kong Toronto Montreal New York Chicago San Francisco Philadelphia Los Angeles New Orleans Buenos Aires Regions affected by air pollution km

Unit 9 Causes and effects of air pollution How are we affected by air pollution? Health problems Lead damages the brain of children Sulphur dioxide, nitrogen dioxide, ozone irritate eyes, nose, ears and throat Dust, cigarette smoke, sulphur dioxide cause breathing problems and lung diseases Cigarette smoke and gases from cars cause heart diseases

Unit 9 Causes and effects of air pollution How are we affected by air pollution? Effects on trees, crops and fish Pollutants like sulphur dioxide, nitrogen oxides and ozone kill plants and trees. Acid rain kills fish and water plants in rivers and lakes. Many lakes in Norway, Sweden and Canada are fishless because the water in them is acidic.

Unit 9 Causes and effects of air pollution How are we affected by air pollution? Corrosion of buildings and statues Pollutants in the air corrode buildings and statues. A lot of money is needed to clean and repair them. In 1908 In 1968

Unit 9 Causes and effects of air pollution How are we affected by air pollution? Changes in weather and climate The temperature of the world is increasing during the last century.

Unit 9 Causes and effects of air pollution How are we affected by air pollution? Changes in weather and climate Global warming caused by greenhouse gases leads to the melting of polar ice sheets. Flooding in Venice The sea level rises and low-lying coastal regions are drowned.