V. Put the verbs in brackets into the correct form to complete the sentences.
1. If the local people drink the contaminated water, they (have) …………….. health problems.
2. If there were more trees in this area, the air (be) …………….. fresher.
3.Global warming (not happen) …………….. if there weren’t too much carbon dioxide in the atmosphere.
4.If people (stop) …………….. digging the street, there wouldn’t be noise pollution in this area.
VI. Fill in each numbered blank with a correct word to complete the following passage.
Air pollution is a growing problem throughout the world. Indoor air pollution is (1) …………….. of the leading causes of lung cancer. Families in developing countries use open stoves for cooking and heating (2) …………….. homes. These homes do not have proper ventilation. The smoke, which is (3) …………….. of chemicals and carcinogens, gets trapped inside where families eat and sleep. Outdoor pollution also (4) …………….. diseases and illness, especially in industrial cities such as Beijing, China, where cancer is (5) …………….. leading cause of death. China relies heavily on coal, which is considered the dirtiest (6) …………….. of energy. According to the European Union, only one percent of urban dwellers in China breathe clean (7) …………….. on an average day. Neighbouring countries including Japan and Korea receive much of China’s pollution in the (8) …………….. of acid rain. This pollution results mainly from the coal powered factories, which produce inexpensive goods (9) …………….. North American and European consumers. Outdoor air pollution is also a concern in many wealthy countries. Those who live and (10) …………….. in urban centres such as Los Angeles or Toronto experience many warm days beneath a layer of smog.
