The Impact Of Cars On The Environment In Nowadays And How To Prevent It
In the course of time our civilization constantly evolves. The population is increasing, newer technologies are being developed to make our live easier. Demand for them is growing, because we have less and less time to deal with other issues than work. The development of civilization has many good sides, but it also has bad effects. Almost every modern device needs energy. You can receive it in many ways, but the cheapest of them: burning oil, gas and coal, are also very harmful to the environment. The demand for energy increases year by year as the number of users increases. This requires burning more and more hydrocarbons and releasing more and more poisonous gases into the atmosphere. The biggest problem concerns motorization - 99% of cars we move are driven by a gasoline or diesel engine. Even a dozen or so years ago, cars were a small environmental problem. Today, the car has almost everyone, and each of them burns huge amounts of fuel. It is true that modern petrol is free of poisonous additives, such as lead, so that the exhaust is much less toxic. However, their number is so huge that they pose a serious threat to our planet.
The number of people is growing and the number of cars also increases. Threats from the automotive industry are becoming more and more common. It results from the fact that most of the vehicles used by us are powered by an internal combustion engine, only a few cars have electric, hybrid or gas drive, which are much more ecological. One of the most serious threats is air pollution which is caused mainly by car exhausts and they cover up to 70%. The biggest burning occurs during continuous starting and braking in traffic jams and fast driving on the motorway. These are the most important sources of human exposure to air pollution. High endangering arises inside vehicle from air intakes to exhaust emission from cars around us as well as during walking or biking. One of the most polluted city in England is London.
The visible effect of the vehicle's emission of gases into the atmosphere is smog, which is a mixture of fog and high concentration of toxic gases and dusts produced mainly by industrial factories and cars. Smog shows very clearly that pollution can not be released and building high chimneys will not cause poisonous fumes to spread through the atmosphere without causing us any trouble. The slight changes in the weather that occur every year at certain times can cause all pollutants we send in the air to settle very low and start poisoning us. Exactly sixty-six years ago Great Smog of London showed us how dangerous it may become. It was so thick and dense that by December there was virtually no sunlight and visibility was reduced to five yards in many places. Smog, depending on the climate in which it arises, may have different composition and various dangerous ingredients.
The smoky fog that plagues the people of London is different than the pollution that hangs over cities like Los Angeles, which is not a foggy place. These two types are known as London Gray Smog and Los Angeles Brown smog. Photochemical smog, or Los Angeles type smog, whose main components are chemically active organic compounds (peroxides, aldehydes) and ozone, carbon monoxide, nitrogen oxides. Photochemical production is formed mainly in the summer months, during strong sunlight, mainly as a result of photochemical transformations of exhaust components. London type smog is typical for European cities smog, arising in the winter, mainly from November to February. It occurs only in a moderate climate zone. The London smog consists mainly of sulfur dioxide, SO2, in smaller amounts from soot, carbon black and other compounds and metals. Smog of this type was a real tragedy in the period of intensive coal exploitation, which releases large amounts of sulfur dioxide.
