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Question 2(a) The constituent of the air that contains harmful gases and dust particles is known as _______.(b) Shortness of breath and intense cough is mainly caused to the inhalation of ______ (polluted air / fresh air). |
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Answer» Question 2 (a) The constituent of the air that contains harmful gases and dust particles is known as _______. (b) Shortness of breath and intense cough is mainly caused to the inhalation of ______ (polluted air / fresh air). |
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