Population and the environment

• Distribution?


  how a population is spread globally/regionally
• Density?


  measure of population per unit area
• Numbers?


  amount of people in a defined area
• Change?


  increases and decreases in a population over a period of time
• How does climate affect a population ?

  health/wellbeing of a population, agriculture, diseases
• How does soil affect a population?

  water content, nutritional content and soil quality affect agricultural productivity
• How do natural resources affect a population?

  water supply for hygiene, sanitisation, agriculture, drinking
• What occurred in the Neolithic revolution?

  shift from hunter gatherer to agricultural populations, fertility rates rise - agriculture feeds denser communities and makes a more stable food supply
• What occurred in the industrial revolution?

  transition from labour intensive industry to manufacturing and technology processes - 57% population growth
• What occurred in the green revolution?

  used technology to maximise yields in 50s/60s
• What was the population below before 1804?

  1 billion
• How many years did it take for the population to reach 2 billion after 1804?

  100
• What is the estimated population by 2050?

  9 billion
• What percentage of the world live in urban areas?

  55%
• How much of the world is expected to live in urban areas by 2050?

  2/3
• What percentage of the population live in the northern hemisphere ?

  90%
• What countries now have the lowest growth rates?

  HIC