ESSAY ON AIR POLLUTION FOR ALL TYPES OF EXAMS
ESSAY ON AIR POLLUTION
Ambient air is a mixture of several gases including nitrogen (79%), oxygen (20%), carbon dioxide (0.03%), and several other inert gases such as argon, helium, krypton, neon and xenon. Unfortunately, the concentration levels of different gases show variations because some gases such as sulphur dioxide, carbon monoxide, emissions from volcanoes and swamps, salt spray, windblown dusts, etc. are continuously added to the air by the natural processes.
Thus, the air becomes polluted when its natural composition is disturbed either by natural or man-made sources or by both. In other words, when the presence of chemicals or their concentrations is high enough to harm organisms, ecosystems or any material in our ecosystem and even to the extent of changing the climate… is known as air pollution.
According to World Health Organisation (WHO) air pollution is defined as limited to situation in which the outdoor ambient atmosphere contains materials in concentration which are harmful to man and his surrounding environment. Every day, we breathe approximately 23,000 times, inhaling about 2000 litres of air. Along with air, we also breathe in a wide variety of pollutants released into the air by automobiles, factories, power plants and other sources.
About 70 per cent of the world’s urban residents breathe air that is unhealthy at least some of the time and an additional 10 per cent breathe air that is only marginally healthy. Several air pollution episodes have occurred in the past causing many deaths.
ESSAY ON AIR POLLUTION >>