Flashcards
Tropospheric ozone
Flashcards do conjunto (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
Informações
- Descrição
- A level Environmental Studies FlashCards sobre Tropospheric ozone, criado por Mollie Munday em 20-02-2019.
- Criado por
- Mollie Munday
- Visualizações
- 2
- Avaliação
Mais sobre Smog and ground-level ozone