Question

The percentage of air pollution caused due to smoke is
(A) 10-15%
(B) 15-20%
(C) 20-25%
(D) 2-5%

Answer 1

Hint: We are mainly dependent on air for respiration. Air pollution can cause harm to all existing living organisms. Automobiles are the major cause of air pollution in developed cities, they emit smoke. A significant amount of air pollution is due to smoke generated through various sources.
Step-by-step solution:
Air pollution reduces the growth and yield of crops and also causes premature death of plants. Air pollution also affects the respiratory system of humans and of animals. Effects can vary up to various degrees depending on various factors such as concentration of the pollutant, duration of exposure and also depend on the organism.
Pollutants such as smokestacks from thermal power plants, smelters and other industries release particulate and gaseous pollutants along with harmful and harmless gases. These pollutants need to be separated before releasing harmless gases into the atmosphere.
Central pollution and control board shortly called CPCB issued that particulate sizes 2.5 micrometres or less in diameter are responsible for causing harm to humans. These particles can cause breathing and respiratory problems when inhaled. Automobiles are the major cause of air pollution, especially in metro cities. Air pollution due to smoke contributes almost 10-15% of the total air pollution.
therefore, option (A) is correct.
Note: Note that noise pollution is also studied under air pollution itself. In 1987 air act was amended to include noise as an air pollutant. Noise causes sleeplessness, increased heartbeat, and altered breathing patterns thus causing stress to humans.