Photochemical smog Flashcards
What is photochemical smog
A mixture of primary and secondary pollutants
What pollutants are involved in the formation of photochemical smog
NOx from vehicle exhausts/ emissions
Tropospheric ozone (O3)
Hydrocarbons
PANs
What type of pollutant is NOx
A primary pollutant
What is the source of NOx
Exhaust gases from petrol and diesel engines
What are the effects of NOx
- increase risk of respiratory infections e.g. flu, colds and bronchitis
- increase existing health problems e.g asthma
What type of pollutant is tropospheric ozone
Tropospheric ozone is a secondary pollutant
What is the source of tropospheric ozone
Chemical reaction between NO2/NOx oxides of nitrogen and UV
What are the effects of tropospheric ozone
Vomiting
Breathing difficulties
Dizziness
What type of pollutant is hydrocarbons
Hydrocarbons are primary pollutants
What is the source of hydrocarbons
Petrol/ fuel station
Hydrocarbons fumes
What are the effects of hydrocarbons
Vomiting
Breathing difficulties
Dizziness
