Examlex
Indirect observation involves actually watching an individual's behavior.
Desertification
A progression where arable land turns into barren desert areas, usually caused by periods of dryness, the removal of trees, or improper agricultural methods.
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.
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