lam giup mk nha yeu yeuuuu

1. b. people knew nothing about environmental pollution => Thông tin: the term "environmental pollution" was quite strange to people 2. a. led a healthy life => Thông tin: They lived healthily 3. d. the polluton of the environment => Thông tin: People all around the world are worried about things that are happening to the environment 4. c. but the still prefer traveling by car => Thông tin: but no one wants to travel on foot or by bicycle 5. d. do not want to spend money on treating the wastes safely => Thông tin: but they do not want to spend a lot of their money on treating the wastes safely 6. b. if we don't scatter our rubbish => Thông tin: Scattering rubbish is bad for our health