The condition that indicates a polluted environment is :

The processes of calcination and roasting in metallurgical industries, respectively, can Iead to :

The incorrect statement(s) among (a) – (d) regarding acid rain is (are) :

(a) It can corrode water pipes.
(b) It can damage structures made up of stone.
(c) It cannot cause respiratory ailments in animals.
(d) It is not harmful for trees

Thermal power plants can lead to :