Both the classic London smog (sulfur dioxide, fog and particulates) and the present photochemical smog (ozone, PAHs, hydrocarbon and nitrogen oxides oxides) are air pollution resulting from primary air emissions like hydrocarbons, sulfur dioxide, nitrogen oxides.
No, "PAN" (peroxyacetyl nitrate) is not a primary pollutant; it is a type of secondary pollutant formed through chemical reactions of primary pollutants like volatile organic compounds (VOCs) and nitrogen oxides (NOx) in the atmosphere. PAN is a photochemical smog component formed in the presence of sunlight.
The word is "smog", a pollutant mix common to many cities worldwide. Smog was a primary reason for research into catalytic converters for automobiles.
Yes, it is a primary pollutant
ozog 78 RDS
SO2
No. Hydrocarbon is a Primary pollutant.
A secondary pollutant is not directly emitted, it is formed in the atmosphere when primary pollutants are mixed as through chemical and photochemical reaction. For example, a secondary pollution would be ozone which is formed when hydrocarbons and nitrogen oxides combine in sunlight
Yes. A primary pollutant is emitted directly into the atmosphere.
Secondary Pollutant
No, Ozone is not a primary pollutant, it is a pollutant near ground level. However, it keeps many ultraviolet rays from reaching the Earth.
Ozone layer present in troposphere is known as bad ozone. It is a pollutant and is a major constituent of urabn smog.