1. Managing change in the human environment Population Change How do populations change?

3. What has happened to word population? World population has doubled between 1950 and 2000 Today and into the future more people are likely to be living in LEDCs than MEDCs A greater proportion of people are living in LEDCs which tend to be poorer and less developed countries 90% (est.) 4.7 billion 80% 1.7 billion 68% LEDC 10% (est.) 1.3 billion 20% 0.8 billion 32% MEDC 2050 (est.) 9 billion 2000 6 billion 1950 2.5 billion World Population

4. What has happened to word population?

6. What are the causes of population change? Stage 1 – high birth rate, high death rate, low growth rate, stable population Stage 2 – high birth rate, death rate begins to fall, growth rate rises, population total rises Stage 3 – Death rate continues to fall, birth rate begins to fall, growth rate begins to slow down, total population rises Stage 4 – Death rate stays the same, birth rate falls, growth slows, total population may decline Demographic Transition Model

7. Population structure The total population will keep growing, typical of an LEDC Increasing number of middle aged people Proportion of young people under 15 is large (young dependents) Proportion of elderly people small The proportion of older people increasing The number of young people under 15 is decreasing (young dependents) The elderly dependent population is increasing Growth is static, typical of MEDC