Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Peroxy acetyl nitrate (PAN) or methyl nitrile
Poly acrylonitrile
Benzopyrene
Photochemical smog

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Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

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

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