Question

Photochemical smog pollution does not contain-

Answer 1

Does not contain carbon dioxide

Hope it tells you☺

Answer 2

Answer:

•  Carbon dioxide.

Explanation:

• Photochemical smog is grey or yellow brown opaque smog having oxidising environment with little smoke.
• Photochemical smog contains secondary pollutants or photochemical oxidants.
• It was first reported over Los Angeles in 1940s. Photochemical smog is formed at high temperature over cities and towns due to still air, emission of nitrogen oxides and carbohydrates from automobile exhausts and solar energy.
• Nitrogen dioxides splits into nitric oxide and nascent oxygen.
• Nascent oxygen combines with molecular oxygen to form ozone.
• Ozone reacts with carbohydrates to form aldehydes and  ketones.
• Nitrogen oxides, oxygen  and ketones combine to form peroxy-acyl-nitrates (PAN).
• In areas with intense solar radiations, photoelectrical smog forms brown air.