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Major outdoor air pollutants
Include carbon oxides, nitrogen oxides, sulfur oxides, suspended particulate matter, photochemical oxidants, VOCs, and hazardous air pollutants.
Primary pollutants
Pollutants like CO2, NOx, and SO2 directly emitted into the troposphere from sources like car exhaust and burning coal.
Secondary pollutants
Formed when primary pollutants react with air, leading to issues like acid rain and photochemical smog.
Photochemical Smog
Formed from car emissions reacting with VOCs and NOx to produce ozone, causing respiratory irritation.
Thermal Inversions
When warm air traps cool air, preventing the dispersion of pollutants, especially problematic in cities and mountainous areas.
Technologies for Removal of Air Pollution
Methods like baghouse filters, cyclone collectors, electrostatic precipitators, wet scrubbers, and catalytic converters help in removing pollutants from the air.
Natural Factors that Reduce Air Pollution
Rain, snow, salty spray from the ocean, and winds play a role in reducing air pollution.
Indoor Air Pollution
Sources include cigarette smoke, CO, formaldehyde, radon-222, asbestos, and fine particulates, leading to health issues like lung cancer and respiratory problems.
Clean Air Acts
The 1973 and 1990 Clean Air Acts aimed to regulate air quality, with the latter introducing the SO2 cap and trade program.
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Flashcard (20)