GEOLOGY

Detailed explanation-1: -90% of the planet’s ozone is in the “ozone layer” which exists in the lower level (20-25 kilometres above sea level) of the stratosphere. The stratosphere is the region of the atmosphere which exists between 10 and 50 kilometres above the surface of the earth.

Detailed explanation-2: -Statement 1: Ozone layer present in the stratosphere protects the living organisms from harmful UV rays coming from the sun by absorbing nearly all of them. Statement 2: Ozone formed in the troposphere by photochemical reactions as a result of human activities which is harmful to all living organisms. Q.

Detailed explanation-3: -Ozone occurs both in the Earth’s upper atmosphere and at ground level. Ozone can be good or bad, depending on where it is found. Called stratospheric ozone, good ozone occurs naturally in the upper atmosphere, where it forms a protective layer that shields us from the sun’s harmful ultraviolet rays.

Detailed explanation-4: -The ozone hole happens when the protective ozone layer in the stratosphere above the South Pole begins to thin every September. Chlorine and bromine derived from human-produced compounds are released from reactions on high-altitude polar clouds.