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1. Because of the polluted water, the fish are dead.
2. Too much carbon dioxide (CO2) in the atmosphere causes global warming.
3. Ships spill oil in oceans and rivers lead to the death of many aquatic animals and plants.
4. Students will be more aware of protecting the environment if teachers teach environmental issues at school.
5. If she didn't work in a noisy office, she wouldn't have a headache after work everyday.
6. By had a stomachache since she ate a big dinner.
7. If people didn't throw rubbish in the streets , the streets would look attractive.
