http://www.bbc.co.uk/schools/gcsebitesize/geography/population/population_change_structure_rev5.shtml
The graph above is an example of a population pyramid. Population pyramids are used for geovisualization, as they display data regarding a society's population. Specifically, they show the gender and age distribution within the population. The population pyramid above shows data about Mozambique. As you can see there are far more young people than old, an indication that the country's people suffer from lower life expectancy. But the baby boom any equal gender level indicates the population will soon grow.
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