Chapter 1 AIR POLLUTANTS SOURCES AND CO
CHAPTER I
AIR POLLUTANTS: SOURCES AND CONTROL OF GASES
Introduction:
1. According to the World Bank, in 2007 air pollution cost about 3.8% of China’s
2. gross domestic product, mainly from diseases and loss of lives.
3. World Health Organization estimates that in India alone about 500,000 premature deaths are caused each year by indoor air pollution.
4. Serious respiratory disease-related problems have been identified for both indoor and outdoor pollution in major cities of several countries.
5. In urban areas, high concentrations of gases and particles from coal combustion and, in more recent decades, motor vehicles have produced severe loss of air quality and significant health effects.
6. Finally, emissions of carbon dioxide and other radiatively active gases, together with stratospheric ozone depletion, represent planet-scale assaults on the quality of our atmospheric environment.
7. In the Western world, stringent environmental legislations have been able to overcome the ‘conventional’ air pollution problems of foul and sooty skylines reminiscent of the industrial revolution.
8. In addition, the recent fuel crisis and growing awareness of sustainable development have also contributed to reduction in aerial emissions of noxious pollutants.
Air pollutants: Sources and control of gases
Defining based on human activities is misleading because it would mean: chemicals such as sulphur dioxide from volcanoes or methane from the decay of natural vegetation are not counted as pollution, but sulphur dioxide from coal-burning or methane from rice-growing are pollution.
Pollution from our activities is called anthropogenic, while that from animals or plants is said to be biogenic.
The pollution is the solid, liquid or gaseous material emitted into the air from stationary or mobile sources, moving subsequently through an aerial path and perhaps being involved in chemical or physical transformations before eventually being returned to the surface.
1.1 UNITS FOR
AIR POLLUTANTS: SOURCES AND CONTROL OF GASES
Introduction:
1. According to the World Bank, in 2007 air pollution cost about 3.8% of China’s
2. gross domestic product, mainly from diseases and loss of lives.
3. World Health Organization estimates that in India alone about 500,000 premature deaths are caused each year by indoor air pollution.
4. Serious respiratory disease-related problems have been identified for both indoor and outdoor pollution in major cities of several countries.
5. In urban areas, high concentrations of gases and particles from coal combustion and, in more recent decades, motor vehicles have produced severe loss of air quality and significant health effects.
6. Finally, emissions of carbon dioxide and other radiatively active gases, together with stratospheric ozone depletion, represent planet-scale assaults on the quality of our atmospheric environment.
7. In the Western world, stringent environmental legislations have been able to overcome the ‘conventional’ air pollution problems of foul and sooty skylines reminiscent of the industrial revolution.
8. In addition, the recent fuel crisis and growing awareness of sustainable development have also contributed to reduction in aerial emissions of noxious pollutants.
Air pollutants: Sources and control of gases
Defining based on human activities is misleading because it would mean: chemicals such as sulphur dioxide from volcanoes or methane from the decay of natural vegetation are not counted as pollution, but sulphur dioxide from coal-burning or methane from rice-growing are pollution.
Pollution from our activities is called anthropogenic, while that from animals or plants is said to be biogenic.
The pollution is the solid, liquid or gaseous material emitted into the air from stationary or mobile sources, moving subsequently through an aerial path and perhaps being involved in chemical or physical transformations before eventually being returned to the surface.
1.1 UNITS FOR