Urban Air
12 important questions on Urban Air
What are Major Air Pollutants (MAPs)
- Nitrogen Oxides (NOx)
- Carbon Monoxide (CO)
- Particulate Matter (PM/PM10)
What are big threats in air pollution?
- Black Carbon (BC)
- Organic Carbon (OC)
Where does EC and BC originate from?
- structure similar to impure graphite
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Where does OC originate from?
- condensation of VOC's (secondary OC)
What are the health impacts of particles?
- Pulmonary effects
- Cardiovascular effects
What are the effects of ozone?
- increase in mortality
- chronic effects
What factors effect urban air quality?
- local meteorological conditions
- city configuration and geometry
What happens with the inversion layer at night?
How does tropospheric ozone formation work?
How does Ozone (O3) emerge?
O + O2 > O3
Photo-stationary state between NO, NO2 and O3
NO2 + O2 = NO + O3
What happens when VOCs disturb the process?
This process bypasses the Photo stationary reaction.
VOCs + NO > NO2
NO2 + O2 <> NO + O3
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