Mọi người giúp em với ạ ,em cảm ơn mọi người nhiều

Question 29: B. Environmental pollution

(More than two hundred years ago, the term “Environmental pollution" was very strange to people....)

Question 30: D. All of these

(More than two hundred years ago, the term “Environmental pollution" was very strange to people. They lived healthily, drank pure water, and breathed fresh air....)

Question 31: C. it is man

(....Actually it is man that is destroying the surroundings with many kinds of wastes......)

Question 32: D. it is bad

(...Scattering garbage is bad for our health,.....)

Chúc bạn học tốt nha !!!