The stratospheric ozone layer absorbs a portion of the ultraviolet (UV) radiation from the sun, preventing it from reaching the surface of Earth.
There are two types of ultraviolet rays that reach the earth’s surface — UVB and UVA. UVB rays are responsible for producing sunburn and can cause skin cancers, crop damage, etc.
Experiments on fish suggest that 90-95 per cent of malignant melanomas (a form of skin cancer) may be due to UVA & UVB radiations. Plants are sensitive to UV radiation below 300 nanometers.
Several commonly used chemicals have been found to be damaging to the stratospheric ozone layer.
Halocarbons are chemicals in which one or more carbon atoms are linked to one or more halogen atoms (fluorine, chlorine, bromine or iodine). Halocarbons containing bromine
— source downtoearth.org.in | Manas Ranjan Senapati | 22 Sep 2021