AP Environmental Science / Unit 7: Atmospheric Pollution
7.6 Reduction of Air Pollutants
Notes
- Catalytic converters cut $\mathrm{CO}$, $NO_x$ and hydrocarbons in cars.
- Scrubbers remove $\mathrm{SO_2}$; electrostatic precipitators and baghouse filters remove particulates.
- Vapor recovery nozzles at gas pumps reduce VOCs.
Practice
A wet scrubber at a coal plant removes:
Sulfur dioxide reacts with lime.
Catalytic converters reduce:
Converts to less harmful gases.
Electrostatic precipitators remove:
Charged plates collect particles.
Ready for more? Take the Unit 7 test.