Environmental Engineering in CE
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?

Carbon monoxide
Sulphur dioxide & spray of weed killers
Smog & ozone
Hydrogen fluoride & nitrogen oxides

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Environmental Engineering in CE
Smoke is produced due to

Poor design & overloading of furnace
Poor quality of fuel and improper mixing of fuel & combustion air
All of these
Insufficient supply of combustion air and insufficient time for combustion

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