List any three human activities which would lead to an increase in the carbon dioxide content of air.
The following three human activities would lead to air pollution:
(i) Burning of fossil fuels like coal and petroleum.
(ii) Emission of harmful gases and dust particles from vehicles.
(iii) Smoke released from industries containing harmful gases like sulphur dioxide, oxides of nitrogen.
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Welcome to the NCERT Solutions for Class 9 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 4 , Question 3: List any three human activities which would lead to an increase in the carbon dioxide content of air....
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