Flashcards
Tropospheric ozone
Cards in this deck (4)
- 1BackgroundStratospheric ozone occurs naturally and is important in preventing too much UV reaching the earth.
Tropospheric ozone, however, is a pollutant and is toxic to living organisms. - 2Effects of troposhperic ozone-Toxic to plants, reduces the growth rate
-Causes breathing difficulties and increase asthma in humans
-Also involved in the production of secondary pollutants in photochemical smogs and acid rain - 3Sources of tropospheric ozone-Secondary pollutant, produced from human activities releasing NOx
• 1 – NO2 broken down by UVA sunlight (photochemical reaction)
NO2 ---> NO + O
• 2- Monatomic oxygen reactions with O2 to produce ozone
O + O2 ---> UVA O3 - 4Control of tropospheric ozone-Levels can be reduced by reducing primary pollutant emissions
-NO2 produced by combustion in engines, power stations etc
-Methods to reduce these levels which prevent ozone formation
Methods include: low-temperature combustion, catalytic converters, urea sprays
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- A level Environmental Studies Flashcards on Tropospheric ozone, created by Mollie Munday on 20/02/2019.
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- Mollie Munday
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