In which layer of the atmosphere is ozone considered a pollutant? (A) Mesosphere (B) Stratosphere (C) Thermosphere (D) Troposphere - HSC - SSCE Chemistry - Question 1 - 2060 - Paper 1

Ozone is considered a pollutant in the Troposphere (Option D). While ozone in the Stratosphere plays a key role in protecting life on Earth by absorbing harmful ultraviolet radiation, at ground level in the Troposphere, it is a harmful pollutant that can cause respiratory issues and other health problems. This is primarily due to its formation from the reaction of sunlight with pollutants like volatile organic compounds (VOCs) and nitrogen oxides.