Which of the following is not industrial waste?
Mining operations
Oil refineries
Pesticides and fertilisers
Cement industries
Pesticides and fertilisers are agricultural wastes
Which of the following are sources of air pollution?
A. Vehicles B. Dams C. Oil refineries D. Mining industries
Which of the broad categories of industries covers oil refinery and sugar mills?
(a) Primary
(b) Secondary
(c) Tertiary
(d) None of them