Environmental Engineering in CE
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because

It forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen
It forms CO₂ by combining with oxygen present in the blood
Of clotting of blood
Of jamming of respiratory tract

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Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

Prevents solar heat being radiated out completely, resulting in
Allows visible solar radiation (ultraviolet) of short wave-length to pass through
All of these
Reflects and absorbs the longer wavelength (infra-red) radiations

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