Question

Between what altitudes, is the ozone layer found in highest concentrations?

(a) 10-20km

(b) 20-40km

(c) 40-55km

(d) 55-70km

This question was addressed to me during an interview.

I'm obligated to ask this question of Ozone Depletion in section Atmosphere & Greenhouse Gases of Environmental Engineering

Answer 1

Correct choice is (b) 20-40km

The best I can explain: The ozone layer is found in high concentrations of 2-8ppm at an altitude of 20-40km.