The ozone layer, a fragile shield of gas, lies in the lower portion of the stratosphere, protecting the Earth from the Sun’s harmful UV radiation, making life possible here. Scientists first got concerned over the increasing size of the ozone hole in the early 1980s. In 1987, the UN declared the Montreal Protocol to initiate global efforts to protect the ozone layer from ozone-depleting substances, such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), which were commonly used in refrigerators and air conditioners.
India joined these global efforts and became a part of the Montreal Protocol in 1992, following which it banned and phased out ozone-depleting substances.
