The population pyramid shows a low birth rate and high life expectancy. This pyramid shows an ageing population. Consequences of an ageing population: Too many elderly people, puts an added strain ...

For 200 years, we've been warned of unchecked population growth and how it leads to environmental instability. On the other ...

Save guides, add subjects and pick up where you left off with your BBC account. Population pyramids are bar charts that show how many people of different ages are living in a place or country.