Question

What is importance of dust in atmosphere

Answer 1

Hey Buddy here's your answer ☺☺

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The dust in the atmosphere is the reason that our sky appears blue. It does not exactly gives us health benefit but sure a beautiful sky to look to! Also, it is the dust that causes rain. The water present in clouds is in vapour phase. For rain to happen, it should become heavy enough to fall. To make it heavy, water should be converted from gaseous phase to liquid phase. And dust comes to the rescue. Around dust particles, the water droplets form which makes it heavier and heavier until it falls. The water droplets cannot form until they are provided with something around which they can condense. Hence, dust provides the platform for condensation. 

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Answer 2

The atmosphere protects living things from the Sun's most harmful rays. Gases reflect or absorb the strongest rays of sunlight (Figure below). The atmosphere shields Earth from the most harmful solar rays.