Question
Complete the given table
Name of polluting gas Source Effect
—————— ————– Combining with haemoglobin and causing respiratory problems
$NO_2$ Chemical industries —————–
$CO_2$ ————— ——————
——————- Biogas plants Greenhouse effect

Answer

Name of polluting gas Source Effect
$CO$ Vehicular exhaust Combining with haemoglobin and causing respiratory problems
$NO_2$ Chemical industries Irritation to lungs and eyes
$CO_2$ Combustion of any kind Greenhouse effect
$CH_4$ Biogas plants Greenhouse effect

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