3.6 Age Structure Diagrams

Human population has not always grown at the rate currently, this is due to -

• Agricultural output increased

• Separation and treatment of human waste

More food and improved sanitation caused -

• Death rates to fall but birth rates remained relatively high

• A period of rapid population growth (almost exponential growth) that has caused ~7.8 billion human population

Human populations is influenced by social and cultural factors that are not as relevant to other biological systems

• Healthcare, birth control, education,