a) What is air?
b) How is clean and polluted air?
c) How is air polluted?
d) How do we become sick?
e) Why should we keep our environment free from pollution?
*****Air is a very important element in our environment. No creature can live without air. It is the life giving force. Clean air is essential for life but polluted air is very harmful . Air can be polluted in many ways. The most common agent that pollutes air is smoke. Smoke is produced when we cook food, burn bricks and refuse . It is also produced when we melt pitch for road construction Innumerable buses, trucks and cars plying in big cities use petrol, diesel and oil. When they are burnt, they create smoke and pollute the air. Mills and factories in large industrial areas also cause serious air pollution. Railway engines and power houses also pollute air. By inhaling this polluted air we become sick. So, for healthien and happier life, we should keep our environment free from air pollution.
Word meaning :-
- Inhaling:- সেবন করে
- Harmful:- ক্ষতিকর
- Bricks:- ইট
- construction :-নির্মাণ
- Polluted:-দূষিত
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