CSE analysis says South Delhi, New Delhi worst affected by ground-level ozone: What is this pollutant?

Description

Also known as tropospheric ozone, ground-level ozone is “a colourless and highly irritating gas that forms just above the Earth's surface (up to 2 miles above the ground),” as per Environment and Climate Change Canada (ECCC).
Also known as tropospheric ozone, ground-level ozone is “a colourless and highly irritating gas that forms just above the Earth's surface (up to 2 miles above the ground),” as per Environment and Climate Change Canada (ECCC).