Examlex
Nicotine is categorized as a __________ , and it increases alertness as well as blood pressure.
Topsoil
Uppermost layer of soil; contains the most organic matter and plant nutrients.
Endemic
A term describing a species or condition regularly found and restricted to a certain area or population.
Dry Deposition
The process by which pollutants in the atmosphere are transferred to the Earth's surface without precipitation.
Wet Deposition
This is the process by which acidic or pollutant materials are removed from the atmosphere in the form of precipitation, such as rain, snow, or fog.
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