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Key Terms
Air Pollution
Any substance in the atmosphere that has harmful effects on humans, animals, plants, or _.
Primary Pollutant
A pollutant emitted _ into the atmosphere in a harmful form.
Secondary Pollutant
A pollutant formed in the atmosphere through _ reactions between primary pollutants, often with sunlight or water.
Anthropogenic
Originating from _ activity.
Carbon Monoxide (CO)
A colorless, odorless gas primarily from _ combustion, which binds to hemoglobin.
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