Layers of Atmosphere Based on Temperature Variation-Troposhere, Stratosphere,Mesosphere,Thermosphere,Exosphere.
OZONE LAYER-Ozonosphere is an important layer found within stratosphere.
Ozone (O3) is found in this layer. Ozone absorbs and prevents the
harmful ultraviolet radiations from reaching earth, thereby
protecting life.
Without Ozone layer, life would not have been possible on earth.
The maximum concentration of ozone occurs at 22 km from the ground level.
Due to human activities ozone layer is becoming thin. The thinning of this layer is called ozone depletion.
Due to severe depletion of ozone in the atmosphere ’ozone holes’ are created. Ozone holes, which were discovered in 1985, are overhead areas having less than 220 Dobson Units (DU). The chemistry of ozone depletion is by CFCS, BFCS and Nitric oxides
