Tóm tắt nội dung:   A Historical Overview of the Development of Clean Air Regulations 1.1 A BRIEF HISTORY OF THE AIR POLLUTION PROBLEM Media reports about air pollution might lead us to think of air pollution as being something that developed in the second half of the 20th century. But this is not so. The kind of air pollution to which human beings have been exposed has changed with time, but air pollution has been known in larger cities at least from the 14th century when people first started using...