Air pollution

Air that is inspired in the atmosphere, the mixture of gases covering the globe. This mixture of gases ensure life on earth and protects us from harmful rays of the Sun. The atmosphere consists of about 10 different gases, mostly nitrogen (78%) and oxygen (21%). That left 1% consists of argon, carbon dioxide, helium and neon. All these gases are neutral, ie not enter into reaction with other substances. There are traces of sulfur dioxide, ammonia, carbon monoxide and ozone (O3) and noxious gases, smoke, salt, dust and volcanic ash. Natural balance of atmospheric gases which was maintained for millions of years, is now threatened by human activity. These dangers would be the greenhouse effect, global warming, air pollution, thinning of the ozone layer and acid rain. In the last 200 years industrialization global cranky the gas needed to atmospheric equilibrium. Burning coal and methane gas resulted in the formation of enormous amounts of carbon dioxide and other gases, especially after the end of the last century show car. Agricultural development has led to accumulation of large amounts of methane and nitrogen oxides in the atmosphere. The greenhouse effect: Existing gases in the atmosphere must withhold the heat produced by the sun reflected on the surface of Earth. Without it Earth would be so cold it froze inat oceans and the people, animals and plants would die. But when pollution increases because the proportion of gases called greenhouse gases, it is noted too much heat and the whole earth becomes warmer. For this reason, in our century, global average temperature has increased by half a degree. Scientists believe is that this temperature increase will continue, and after all expectations, to the next century will reach the value of 1,5-4,5 degrees Celsius. By some estimates, today over one billion people inspire air very polluted, especially with carbon monoxide and sulfur dioxide, from industrial processes. For this reason, the number of those chest-pulmonary diseases, especially among children and the elderly, is growing. So are frequent cases of skin cancer is increasing. The reason the ozone layer is damaged, no longer retain harmful ultraviolet radiation. Holes in the ozone layer: The ozone layer in the stratosphere protects us retaining the sun's ultraviolet rays. Because nowadays greatly increased use of hydrocarbons clorinate, fluorinated bottles in aerosols, refrigerators, detergents and polystyrene, they have enough gas in the air in quantities greater than those which might be incurred by the atmosphere. As the lift is down, the train cloridioni, which attack and destroy the ozone layer. The question was first reported there in 1985 by scientists working in Antarctica, when they observed the formation of holes in the ozone layer. Researchers were concerned that the ozone layer could rarefy in other parts of the world, raising the level of harmful radiation. Unfortunately in 1995 noted that the area Arcticii and N Europe were formed holes in the ozone layer. Acid Rain: Acid rain is formed when sulfur dioxide or nitrogen oxides, both results of industrial pollution, the atmosphere is mixed with water steam. Acid rain destroys plants and animals. Whole forests have disappeared due to acid rain. Worse is if the rains arrive in acidic lakes or rivers which lead to distance and killing the small bodies. After the estimation of scientists until 2001 will be only in the United States and 50,000 lakes when biological death. Disturbance of natural equilibrium atmosphere can not only harm the Earth. Because global warming will increase sea level, located below the regions being swallowed by water. It is expected that water swallow cities London or New York. Pollution of water resources may result in the outbreak of epidemics, the occurrence of serious illness and death. And relationships are changed precipitation distribution: entire regions can be completely dry, resulting in famine and the loss of many lives. In 1995 in Britain of children under 18 years, every seventh suffered from asthma. Alveolelor inflammation of the lungs and cause respiratory difficulties, sensations of choking. Is not yet proven that this disease would be produced by air pollution, but one thing is certain: the symptoms worsen pollution. Main guilty are both exhaust and gases formed under the effect of solar radiation from fuel combustion products. Syrups and improving accesses inhalatiile curative, preventive medication is effective, but research continues in the direction of halting these diseases, which took worrisome proportions. Nowadays attention is focused increasingly more towards environmental issues, many governments take green issues into consideration. In preserving the world energy resources is an acute problem. Throughout the world are on campaigns trying to persuade governments to stop the destruction of equatorial forests. Population contribute to these campaigns, because not buy products made from tropical wood, somewhat reducing the demand for it. Countries that are helping to restore balance, through the planting of young trees. One thing is sure: today we can no longer breathe clean air. Freonii were removed from industrial processes and have been replaced with other substances. Atmosphere but is dangerous as it is in danger the whole environment of life. It requires a rigorous control and radical measures for the future of air to be sure.