Science
A gas 'X' which is a deadly poison is found at the higher levels of atmosphere and performs an essential function.
Name the gas and write the function performed by this gas in the atmosphere. Which chemical is linked to the decrease in the level of this gas? What measures have been taken by an international organization to check the depletion of the layer containing this gas?
Answer
The gas ‘X’ is ozone (O3).
It forms a layer in the stratosphere, called the ozone layer, which performs the essential function of absorbing harmful ultraviolet (UV) radiation from the Sun and thus protects living organisms from genetic damage and skin cancer.
The main chemicals responsible for the depletion of ozone are chlorofluorocarbons (CFCs), which were used in refrigerators, air conditioners, and aerosol sprays.
To check this depletion, the Montreal Protocol (1987) was signed by various countries as an international agreement to phase out the production and use of CFCs and other ozone-depleting substances.
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