Air Pollution, contamination of the atmosphere by gaseous, liquid, or solid wastes or by-products that can endanger human health and the health and welfare of plants and animals, or can attack materials, reduce visibility, or produce undesirable odours. Among air pollutants emitted by natural sources, only the radioactive gas radon is recognized as a major health threat. A by-product of the radioactive decay of uranium minerals in certain kinds of rock, radon seeps into the basements of homes built on these rocks, posing a risk of lung cancer to residents.
Effects of Air Pollution
Potential pollutants may exist in the materials entering a chemical or combustion process (such as lead in petrol), or they may be produced as a result of the process itself. Carbon monoxide if inhaled in excess can cause lung problems, loss of oxygen in the blood & finally cause death .In December 1984 deadly methyl isocyanate gas was leaked from a chemical plant in Bhopal, causing the deaths of at least 3,300 people.
Water Pollution, contamination of water by foreign matter such as micro-organisms, chemicals, industrial or other wastes, or sewage. Such matter deteriorates the quality of the water and renders it unfit for its intended uses.
Effects of Water Pollution
Notable effects of water pollution include those involved in human health. Nitrates (the salts of nitric acid) in drinking water can cause a disease in infants that sometimes results in death. Cadmium in sludge-derived fertilizer can be absorbed by crops; if ingested in sufficient amounts, the metal can cause an acute diarrhoeal disorder and liver and kidney damage. The hazardous nature of inorganic substances such as mercury, arsenic, and lead has long been known or strongly suspected.
Noise Pollution, adverse effects of noise in our living and working environment. Noise is, by definition, unwanted sound. It may be annoying, it may interfere with speech communication, leisure, or relaxation, and, at very high levels which may occur at work or during certain noisy leisure activities, it may result in hearing loss by causing damage to the hair-cells in the cochlea in the inner ear. Rather than leading to significant adverse physiological responses, however, noise is more often a major problem in terms of quality of human life in specific localities.
Traffic Pollution, contamination due to high levels of traffic, caused mainly by the burning of fossil fuels, primarily oil in the form of petrol and diesel.The most prevalent pollutants from traffic are carbon monoxide, nitrogen oxides, volatile organic compounds, and particulates. For these emissions, transport sources in advanced countries constitute between 30 and 90 per cent of emissions from all sources. There are also lead compounds, and a smaller amount of sulphur dioxide and hydrogen sulphide. Asbestos may be released into the atmosphere when braking. Traffic is also an important source of carbon dioxide.
Carbon monoxide is a poison. At low doses it can impair concentration and performance. Oxides of nitrogen and sulphur may have serious effects on asthma sufferers, whose attacks are worse in conditions of high vehicle pollution, though the precise medical explanation is not yet understood. Volatile organic compounds include benzene, which can cause cancer .
As the World is now completly globlalized working hours are very long with very little time of intervals in...