A.Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
B.On the basis of the amount and their relative harmfulness or toxicity
C.Both (a) & (b)
D.None of these
A.Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
B.On the basis of the amount and their relative harmfulness or toxicity
C.Both (a) & (b)
D.None of these