THERE ARE MANY FACTORS CONTRIBUTING TO AIR POLLUTION

25. - DE THI MAU KHONG DAP AN 2014 MÔN TIẾNG ANH
Tiếng Anh DE THI MAU KHONG DAP AN 2014 MÔN TIẾNG ANH
25. There are many factors contributing to air pollution.A. Air pollution results in many consequences.B. Air pollution is the result of burning forests.C. Factors contributing to air pollution are numerous.D. Air pollution is contributing to these phenomena.