| Term | Definition |
|---|
| air pollution | condition in which the air contains substances harmful to living things |
| secondary pollution | pollutant that forms when a primary polluant or a naturally occuring substance, such as water, comes into contact with other primary pollutants and a chemical reaction takes place |
| primary pollution | pollutant put directly into the air by human activity, such as soot from smoke |
| sick-building sydrome | condition of buildings with particularly poor air quality; frequently caused by sealed windows and poor air circulation |
| smog | air pollution over urban areas that reduces visibility; combination of the words smoke and fog |
| radon | gas produced naturally in the Earth by the decay of uraium |
| asbestos | mineral that seperates into long, threadlike fibers; frequently used for insulation |
| greenhouse effect | warming effect on the air caused by heat rising from the surface of the Earth and being trapped by gases in the troposphere |
| global warming | an increase in the average temperature of the earth's atmosphere (especially a sustained increase that causes climatic changes) |
| ozone | form of oxygen with with molecules made of three oxygen atoms |
Combine with other sets
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