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Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
Population Composition & Structure - Food Supply
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Population Composition & Structure - Food Supply

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  • 1. Population Composition & Structure Pt 2 Food Production
  • 2. Population Composition & Structure <ul><li>World Patterns </li></ul><ul><ul><li>Youngest populations </li></ul></ul><ul><ul><ul><li>Africa, Asia and Latin America </li></ul></ul></ul><ul><ul><li>Oldest populations </li></ul></ul><ul><ul><ul><li>Europe </li></ul></ul></ul>
  • 3. Population Composition & Structure <ul><li>Elderly in the US </li></ul><ul><ul><li>1 in 8 Americans are elderly </li></ul></ul><ul><ul><li>Elderly population has increased since 1900 </li></ul></ul><ul><ul><li>Increase is due to </li></ul></ul><ul><ul><ul><li>High fertility rates in late 1800s and early 1900s created a large cohort of elderly now </li></ul></ul></ul><ul><ul><ul><li>A marked decline in mortality in the past 75 years </li></ul></ul></ul><ul><ul><ul><li>A high level of immigration prior to WWI </li></ul></ul></ul><ul><ul><ul><ul><li>Young people were the migrants </li></ul></ul></ul></ul>
  • 4. Population Composition & Structure <ul><li>Elderly in the US </li></ul><ul><ul><li>See Census Map for census region designations </li></ul></ul><ul><ul><li>Northeast Region and North Central Division States have larger % of elderly than the South and West regions </li></ul></ul><ul><ul><li>In metropolitan areas, elderly tend to be concentrated in central cities </li></ul></ul><ul><ul><li>Concentrated in rural areas </li></ul></ul><ul><ul><li>More affluent elderly have moved to the Sunbelt </li></ul></ul>
  • 5. Population & Food Supply
  • 6. Trends in Food Production <ul><li>2/3 world cropland planted in cereals and grains </li></ul><ul><ul><li>Provides ½ energy intake </li></ul></ul><ul><ul><li>Wheat & rice </li></ul></ul><ul><li>US agriculture </li></ul><ul><ul><li>More productive </li></ul></ul><ul><ul><ul><li>Mechanization </li></ul></ul></ul><ul><li>Between 1950 and 1990 world food production increased 2.6 times </li></ul><ul><li>BUT since 1984 grain production per capita has fallen </li></ul>
  • 7. Trends in Food Production <ul><li>China </li></ul><ul><ul><li>Accounts for 35% of 3 rd world food output </li></ul></ul><ul><ul><li>Has 30% of 3 rd world’s population </li></ul></ul><ul><ul><li>Sub-Saharan Africa </li></ul></ul><ul><ul><ul><li>Deteriorating diets </li></ul></ul></ul><ul><ul><ul><li>Increase in hunger </li></ul></ul></ul>
  • 8. Strategies for Increasing Food Supply <ul><li>See Table 10-4 </li></ul><ul><li>Increasing yields is most practical solution </li></ul><ul><li>How do we increase yields? </li></ul><ul><ul><li>Chemical fertilizers </li></ul></ul><ul><ul><ul><li>Increase yields dramatically </li></ul></ul></ul><ul><ul><ul><li>3 rd world farmers can’t afford them </li></ul></ul></ul><ul><ul><ul><li>Environmental impacts </li></ul></ul></ul><ul><ul><li>Pesticides and herbicides </li></ul></ul><ul><ul><ul><li>½ of global food is lost to pests </li></ul></ul></ul><ul><ul><ul><li>Environmental impacts </li></ul></ul></ul>
  • 9. Strategies for Increasing Food Supply <ul><li>How do we increase yields? </li></ul><ul><ul><li>Irrigation </li></ul></ul><ul><ul><ul><li>Plays an important role in world food supply </li></ul></ul></ul><ul><ul><ul><li>Pakistan </li></ul></ul></ul><ul><ul><ul><ul><li>65% of its farmland is under irrigation </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>80 % of food </li></ul></ul></ul></ul></ul><ul><ul><ul><li>India </li></ul></ul></ul><ul><ul><ul><ul><li>30% of its farmland is under irrigation </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>55% of food </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Global water deficit may present a problem </li></ul></ul></ul>
  • 10. Strategies for Increasing Food Supply <ul><li>How do we increase yields? </li></ul><ul><ul><li>Genetic improvement of plants </li></ul></ul><ul><ul><ul><li>Green Revolution </li></ul></ul></ul><ul><ul><ul><ul><li>Hardier, pest resistant plants </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Produced great increases in grain yields </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Pitfall </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Gains not equally distributed </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>3 rd world farmers could not afford the necessary technology </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Tropical crops were neglected </li></ul></ul></ul></ul></ul>
  • 11. Strategies for Increasing Food Supply <ul><li>How do we increase yields? </li></ul><ul><ul><li>Genetic improvement of plants </li></ul></ul><ul><ul><ul><li>Genetically Modified Foods (GMOs) </li></ul></ul></ul><ul><ul><ul><ul><li>Highly controversial in Europe </li></ul></ul></ul></ul>
  • 12. Reading on Your Own <ul><li>Read the sections on Triage and Life Boat Ethics on your own in preparation for small group discussions. </li></ul>

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