Question

collect the gases and percentage of gases causing air pollution in rural and urban areas a) convert the percentage of gases into ratio in urban and rural area.b) take the average of each gas in rural and urban and convert into decimal​

Answer 1

The immediate environment of man comprises of air on which depends all forms of life. Human beings need a continuous supply of air to exist. The requirement for air is relatively constant about 10-20m3 per day (Park 2009). Air is a mechanical mixture of gases. The normal composition of external air by volume is approximately as follows Nitrogen 78.1%, Oxygen 20.93%, and Carbon dioxide 0.03%.