The night before the exam, sleep. A rested mind recalls what a tired one has only read.

Environment & Ecology — quick quiz

5 BPSSC SI-pattern questions on Environment & Ecology. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 5

Easy

The Montreal Protocol, signed in 1987, was an international treaty primarily aimed at protecting which layer of the Earth's atmosphere?