1. The soil becomes ____________________ because of the use of so many pesticides and fertilizers. (contaminate)
2. ____________________ waste spills can contaminate groundwater. (industry)
3. In many developing countries, water pollution is usually a leading cause of ______________________. (die)
4. ___________________ elements have been found in both ground and underground water sources. (pollute)
5. Fish and many other animals are killed by __________________ in their habitats. (pollute)
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Sinh Học lớp 12
