Fellmann11e ch13


Published on

Published in: Technology
  • Be the first to comment

  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Fellmann11e ch13

  1. 1. Human Geography Jerome D. Fellmann Mark Bjelland Arthur Getis Judith Getis
  2. 2. Human Geography Chapter 13 Human Impacts on Natural Systems Insert figure 13.6a Photo by Mark Bjelland
  3. 3. Physical Environments and Cultural Impacts <ul><li>Environment </li></ul><ul><li>Biosphere </li></ul><ul><ul><li>The thin film of air, water, and earth within which we live, including the atmosphere, surrounding waters, and the upper reaches of the earth’s crust </li></ul></ul>Human Geography 11e
  4. 4. Climates, Biomes, and Change <ul><li>Biomes </li></ul><ul><ul><li>A major ecological community, including plants and animals, occupying an extensive earth area </li></ul></ul><ul><li>Climate Change </li></ul><ul><ul><li>Change in the earth’s climate system, whether natural or caused by humans </li></ul></ul><ul><li>Global Warming </li></ul>Human Geography 11e
  5. 5. Climates, Biomes, and Change <ul><li>Humans have significantly altered the chemical composition of the atmosphere since the advent of the Industrial Revolution around the year 1750 </li></ul><ul><li>The Greenhouse Effect is the result of specific gases partially capturing the long-wave heat energy radiated the earth </li></ul>Human Geography 11e Insert figure 13.5
  6. 6. Climates, Biomes, and Change <ul><li>Acid Rain </li></ul><ul><ul><li>Pollutants that are created by burning fossil fuels and that change chemically as they are transported through the atmosphere and fall back to earth as acidic rain, snow, fog, or dust </li></ul></ul><ul><ul><ul><li>Pollutants are chiefly oxides of sulfur and nitrogen </li></ul></ul></ul><ul><ul><ul><li>The sources of pollution are vehicles, industry, power plants and ore smelting facilities </li></ul></ul></ul>Human Geography 11e
  7. 7. Climates, Biomes, and Change <ul><li>The Trouble with Ozone </li></ul><ul><ul><li>Ozone blocks the cancer-causing ultraviolet (UV) light that damages the molecule of heredity and cell control </li></ul></ul><ul><ul><ul><li>However, the Ozone shield now appears in danger of destruction by chemicals released into the air by humans </li></ul></ul></ul>Human Geography 11e
  8. 8. Land Use and Land Cover <ul><li>Tropical Deforestation </li></ul><ul><li>Desertification </li></ul><ul><li>Soil Erosion </li></ul>Human Geography 11e Insert figure 13.14 © David Rose/Panos Pictures
  9. 9. Land Use and Land Cover <ul><li>Tropical Deforestation </li></ul><ul><ul><li>The tropical rain forest biome is feeling the pressures of </li></ul></ul><ul><ul><ul><li>Growing population numbers </li></ul></ul></ul><ul><ul><ul><li>The need for more agricultural land </li></ul></ul></ul><ul><ul><ul><li>Expanded demand for fuel and commercial wood </li></ul></ul></ul><ul><ul><ul><li>Forest destruction for the expansion of grazing land </li></ul></ul></ul><ul><ul><li>When tropical rainforest is cleared, vegetation will be less effective releasing oxygen in the atmosphere </li></ul></ul><ul><ul><li>Forest destruction changes surface and air temperatures, moisture content, and reflectivity </li></ul></ul>Human Geography 11e
  10. 10. Land Use and Land Cover <ul><li>Desertification </li></ul><ul><ul><li>The spread of desert-like landscapes into arid and semiarid environments </li></ul></ul><ul><ul><li>Accelerates because of human activity, mainly overgrazing, deforestation for fuel wood, clearing of original vegetation for cultivation, and burning </li></ul></ul><ul><li>Soil Erosion </li></ul><ul><ul><li>Accelerated soil erosion quickly removes tropical forest soils from deforested areas </li></ul></ul>Human Geography 11e
  11. 11. Water Supply & Water Quality <ul><li>Patterns of Availability, and Water Use and Abuse </li></ul><ul><ul><li>The problem is not with the global amount of water but with its distribution and the variability of precipitation from year to year </li></ul></ul><ul><ul><li>Regional water sufficiency is also a function of the size of the population using the water and the demands it places on the resource </li></ul></ul>Human Geography 11e
  12. 12. Garbage Heaps and Toxic Wastes <ul><li>Solid Wastes and Rubbish </li></ul><ul><ul><li>Landfill Disposal </li></ul></ul><ul><ul><li>Incineration </li></ul></ul><ul><ul><li>Ocean Dumping </li></ul></ul><ul><li>Toxic Wastes </li></ul><ul><ul><li>Radioactive Wastes </li></ul></ul><ul><li>Exporting Waste </li></ul>Human Geography 11e
  13. 13. Prospects and Perspectives <ul><li>Link to Culture and Human Geographic Patterns </li></ul><ul><li>Diverse Systems of Exploitation of the Environment </li></ul>Human Geography 11e