martes, 18 de diciembre de 2012
Map of natural increase of world population
Main migration waves
World population distribution
Model of population cycle
Population density
Population density is the number of people per unit of area usually per
square kilometer or mile (which may include or exclude cultivated or
potentially productive area). Commonly this may be calculated for a county, city, country, another territory, or the entire world.The world's population is 7 billion, and Earth's total area (including land and water) is 510 million square kilometers (197 million square miles).Cities with high population densities are, by some, considered to be
overpopulated, though the extent to which this is the case depends on
factors like quality of housing and infrastructure and access to
resources.
martes, 11 de diciembre de 2012
Map Of Countries Of The European Union
miércoles, 17 de octubre de 2012
viernes, 5 de octubre de 2012
The water cycle
viernes, 28 de septiembre de 2012
World climatological map
miércoles, 26 de septiembre de 2012
Politician Map of Europe
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