Cars kill people in cities
In all big cities emissions of motor vehicles accounted for 80% of all pollutants in the atmosphere. Each car annually throws in case of normal operation up to 750 kilograms of pollutants. It means that townspeople pass through their lungs more thousands of tons of carbon-black, carbon monoxide, nitrogen oxide, hydrocarbons and sulphur anhydride.
Carbon monoxide causes blocking of haemoglobin in the blood and reducing the ability of blood to transport oxygen from the lungs to the body tissues, thus threatening attacks of coronary insufficiency, stenocardia and even myocardial infarction, violation of visual perception and damage to the nervous system. Hydrocarbon causes respiratory tract irritation, the emergence of nausea, drowsiness, circulatory disorder and significantly reduces the body's immune activity. Nitrogen oxides causes vomiting, short breath, cough, cold and even loss of consciousness.
Of course, all these substances are also emitted by industrial enterprises, but only car throws them all at once. Therefore, it becomes clear that waiting for a bus, standing at the stop near the huge traffic jam a passenger may behave in the cabin absolutely inadequately. And one more thing. Older people, who like to visit friends during peak hours, must note that exactly the same standing at the stop can cost them their lives.
The concentration of pollutants at a distance of 15 metres from the road reduces only by 20%. Especially unlucky are the first floors of homes, and this is probably right, that all first floors in central streets become increasingly occupied by different stores, which, unlike the tenants can afford to install air-conditioner filter.
How harmful is "iron friend" for people can be understood from the fact that the notorious emissions make up only 15% of all exhausts of the car (used petroleum products, tyres, batteries, body parts, metal). For example, oil in the car is replaced 2-4 times annually. Each such replacement makes 2-4 litres of valuable petrochemical feedstock, which is irretrievably lost and causes serious damage to the natural environment. Used oil from only one car for one replacement can spoil the annual supply of drinking water for 50 people. The picture of huge oil spills around the garages is a habitual picture.
If emissions from motor vehicles can be fought quite effectively, for example, converting city vehicles for gas - a safer fuel, the problem of recycling tires and batteries remains very topical.
Global reserves of worn tires are estimated at 25 million tons with an annual growth of at least 7 million tons. Their quantity is alarmingly great, and besides, they are durable, not biodegradable, require large areas for storage, can cause ignition, but also serve as an excellent home for different insects, rodents and other animals. In the storage places for tires happens the groundwater pollution by means of run-off a number of toxic organic compounds from them. In addition, there is a group of organic substances, which may be unknown, since different countries while creating tyres use different plasticizers, softeners, etc. Non-toxic organic substances occur extremely rarely among them.
There are no necessary security guarantees burning of old tires. In this process organic compounds which are dangerous when you receive them always form. The risk of each of these organic substances may increase in their joint impact on people.
