TAILIEUCHUNG - English Test 5 : Air Pollution

Tham khảo tài liệu 'english test 5 : air pollution', tài liệu phổ thông, ôn thi đh-cđ phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | English Test 5 Air Pollution Clean air provides us with a healthy supply of oxygen. When wastes are poured 1 the atmosphere the air becomes contaminated and unpleasant to breathe. This is air pollution. Water vapour and carbon dioxide occur in the air naturally. Examples of air pollution are dust storms volcanic eruptions forest fires 2 by lightning pollen and marsh gases. A large 3 of air pollution in cities comes from sources other than industry mainly automobiles home heating and garbage disposal Vehicles also account 4 air pollution in the cities. Automobiles exhaust and some industrial processes contain carbon monocide an odourless gas which cannot be seen or tasted. Nitric oxide is another tail - pipe emission that is highly poisonous and may sometimes 5 into the even more dangerous nitrogen dioxide. Lead andsmoke are emitted in engine exhausts as tiny particles. Smog - originally a combination of smoke and fog - also 6 in the atmosphere when nitrogen oxides and organic gases combine under the influence of sunlight. This is photochemical smog. It may not sound familiar but it is commonly found in most major cities 7 _there are large concentrations of industry and automobiles. Industrial smoke stacks throw out sulphur and nitrogen oxide. Burning coal and oil releases other gases harmful 8 humans. The most serious of these gases is sulphur dioxide. In the atmosphere it can 9 with water vapour and oxygen to turn into a sulphuric - acid mist. Hydrogen fluoride is produced in the manufacture of phosphate fertilizers and some metals. Burning garbage and paper wastes pollute the air with unpleasant odours. Dangerous chemicals can be released 10 burning plastics or hairspray containers. New words Contaminate Pollen Disposal Nitrogen dioxide NO2 Vapour Exaust photochemical Oxygen O Emission Emit Account for Carbon monoxide CO Sulphur S Release Stag Hydrogen fluoride HF Sulphur dioxide SO2 Marsh Organic Nitric oxide NO Sulphuric acid H2SO4 Comprehension 1 .

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