Question
Why are the water vapour and dust particles important elements of weather and climate? Describe.
Solution
The water vapour and dust particles are the important elements of weather and climate. They are sources of all forms of condensation and principal absorbers of heat received from the sun or radiated from the earth. Besides, they affect the stability of the atmosphere. Water vapour may not exceed 3 per cent to 4 per cent of total volume of air. The amount of water vapour in the atmosphere decreases from the equator towards the poles. It is in this layer of the atmosphere that solid particles of dust, salt, pollens etc. are held in the suspension. They act as hygroscopic nuclei with positive charged and entrap the negatively charged water particles to produce clouds.
