1 ) If people ate dirty food, they would be cancer.
2) If a factory directly discharge a large volume of waste water into the Thi Vai River, the river will be poluted.
3) Farmers use polluted water to water their plants. If people ate these plants, they would become sick.
4) If thermal pollution takes place, the water temperature in steams, rivers, lakes and oceans will increase or decrease suddently.
5) If people lived in radioactive pollution area, they could be skin cancer.
