Выберите правильный вариант ответа. you should leave … your computer … your tv on when you leave the house. as … as not so … so either… or neither … nor
Entry and accumulation in the environment of different substances and compounds in concentrations exceeding the natural (background ) level . Environmental pollution in DOS. associated with industrial activity of man , although sometimes it is due to natural causes ( volcanoes , dust storms , forest fires , etc.). DOS. contaminants - industrial enterprises (especially metallurgical and chemical ) , combined heat and power , transport , urban and agriculture . In Russia, large pockets of air pollution generated in the industrial centers (Norilsk , Magnitogorsk , Lipetsk and Cherepovets, Nizhny Tagil , etc.) and cities - millionaires . In large cities, pollution by 70% due to the exhaust of vehicles , which contain approx. 200 toxic substances (including carbon monoxide, nitrogen oxides , lead compounds ) . In cities and their surroundings loss occurs ( precipitation ) of atmospheric pollutants on the ground, which leads to the formation of geochemical anomalies. Some heavily polluted river - cf. During the Volga , Don , rivers of the Kola Peninsula , the lower reaches of the Amur.Environmental pollution by industrial enterprisesEnvironmental pollution by industrial enterprises Pollution affects the health of humans, causing a number of serious diseases. Pollution levels monitored values of maximum permissible concentration (MPC) , the maximum permissible emissions (MPE ), etc. The greatest threat to the health of the radioactive contamination of the environment - the result of accidents at nuclear power plants in the world and conducted nuclear tests in 1850 . Especially dangerous isotopes of cesium and strontium that accumulate in the soil and reach the food chain to humans. Also radionuclides have mutagenic pesticides and heavy metals . Environmental contamination can be solved as a result of monitoring the state of the environment , comprehensive utilization of resources , the introduction of low-and non-waste production , the creation of sewage treatment plants
Most people have the ability to learn a foreign language. They simply need constant encouragement in order to overcome their fears. Conversation seems to be the most difficult aspect for some students while for other it is comprehension of the spoken word. This feeling is not exclusive to those who feel least confident, as even the most outgoing students are sometimes reluctant to speak. One reason for this reluctance may be shyness. Students may be ashamed of their accent. We could say that the root of this problem might be the student`s desire for perfection, but no one can have perfect pronunciation without practice.
