Question

Q.28 What do you understand by air pollution ? Describe in brief its causes, effects and control
measures.
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Answer 1

Answer:

Air pollution refers to any physical, chemical or biological change in the air. It is the contamination of air by harmful gases, dust and smoke which affects plants, animals and humans drastically. ... An increase or decrease in the composition of these gases is harmful to survival.

Answer 2

Explanation:

i am fine aap btao aap kaise ho ? and happy propose day