Question 83:
In context of environment, the term “dirty dozen” refers to:
12 ozone layer depleting substances
12 persistent organic pollutants
12 most harmful greenhouse gases
12 most degraded ecosystems
Select the correct answer using the codes given below:
Options:
(A) Only 3
(B) 1, 2 and 3
(C) Only 2
(D) 1, 2, 3 and 4
Answer:
B