Question

Which of these are biodegradable pollutants?

(i) Pesticides

(ii) Mercuric salts

(iii) Sewage

(iv) Radioactive wastes

विकल्प

• (i) and (ii)

• (i) and (iii)

• (i), (iii) and (iv)

• (iii) only

Answer 1

(iii) only

Explanation:

Only sewage is biodegradable.