Examlex
Heroin first became popular among opioid abusers in the 1970s,due to returning Vietnam veterans.
Females
Individuals of the sex that typically possesses the ability to bear offspring or produce eggs.
Population Density
The number of people per square mile.
Urban Populations
The segment of the total population living in areas classified as urban, often characterized by higher density of human structures and services compared to rural areas.
Rural Populations
Communities or groups of individuals living in areas characterized by low population density and geographic distance from urban centers.
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