For which of the following reasons can natural pollutants play an important role in controlling air pollution?
A.They function as part of a purification process.
B.They occur in greater quantities than other pollutants.
C.They are less harmful to living beings than other pollutants.
D.They have existed since the Earth developed.
A.They function as part of a purification process.
B.They occur in greater quantities than other pollutants.
C.They are less harmful to living beings than other pollutants.
D.They have existed since the Earth developed.
Loga
Hóa Học lớp 12
