IV

1. The polar icecaps are melting because one effect of global warming is that sea levels are rising

2. Because of much better levels of nutrition, the global population has increased

3. Nuclear explosions and detonations of nuclear weapons lead to radioactive pollution

4. Air pollution is rising as a consequence of more and more road are being built

5. hỏng bt

6. The fish and other aquatic animals have died due to the water is polluted

XIV

1 If people eat dirty food, they can be cancer

2 If a factory didn't directly discharge a large volume of waste water into the Thi Vai river, it wouldn't be polluted

3 If  farmers didn't use polluted water to water their plants, people eat these plants wouldn't become sick with diseases such as diarrhea, bacterial infections even cancer

4 If thermal pollution  takes place, the water temperature in streams, rivers, lakes and oceans will increase of decrease suddenly

D. READING 1. Read the text then choose the best answer.

1D

2A

3A

4B

5D

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