Cho mk câu trả lời hay nhất nhé
1. pollution
2. serious
3. exhaust
4. percentage
5. Factories
6. reduce
7. Scientists
8. require
II/
1. Yes.
2. Yes, it is. Because much pollution is caused by things that benefit people.
3. Scientists and engineers.
4. The government can pass and enforce laws that require businesses and individuals to stop or cut down on certain polluting activities.
