the set of countries with the greatest population densities are: England, France and Spain; France, Italy, Spain; Germany, Italy, England or Poland, England, Germany
Population density is a measurement of population per unit of area. When applied to human populations, population density refers to the number of people that live in a unit of area (usually a square kilometer or square mile). This is usually calculated for a city, country or another territorial division. Population density is an important geographical term as it allows us to better understand the way a particular population lives in relationship to its territory and resources.
