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Overpopulation

Overpopulation. Ozone Function : Block UV radiation from sun Problems : 1) CFCs destroying O 3 molecules in atmosphere 2) Ozone layer is thinning 3) More UV radiation reaches the surface Effects : Crop damage, skin cancers, Eye damage Solution : Reduce CFCs, regrow trees.

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Overpopulation

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  1. Overpopulation

  2. Ozone Function: Block UV radiation from sun Problems: 1) CFCs destroying O3 molecules in atmosphere 2) Ozone layer is thinning 3) More UV radiation reaches the surface Effects: Crop damage, skin cancers, Eye damage Solution: Reduce CFCs, regrow trees Ozone Layer Depletion

  3. The Good and the Bad The Good The Bad

  4. G.H.E. is naturally good (it warms Earth) Problem: Excess CO2 absorbs excess heat near the earth Fear: Climate patterns change, ice caps melt Main Cause: CO2 from burning of fossil fuels (coal, oil, natural gas) Solutions: Reduce use of fossil fuels, regrow trees, alternative energy sources The Greenhouse Effect

  5. What’s in a name? The purpose of a greenhouse is to trap heat year round

  6. Earth

  7. Earth

  8. Earth

  9. The Greenhouse Effect

  10. Defined: Clearing of forested areas Reasons: High demand for wood products, create farmland Problems: Species extinction Excess CO2 in atmosphere Desertification: wind/rain carry soil away Solutions: Recycle, improved farming techniques Deforestation

  11. The Big Problem: Overpopulation • Over 6.6 billion people • Many natural resources are nonrenewable • Fossil fuels take millions of years to form • More people means: • 1) More forests removed • 2) More resources consumed • 3) More CO2 released

  12. LessonsfromChina • Encourage smaller families by: • 1) Free education for life to one child family • 2) Free birth control • 3) Financial: Salary, Pension, Housing, Medical • 1970s = 5.8 children Today = 1.8

  13. Pollution Solutions • Act locally • Reduce usage of natural resources • Recycle at home • Support Environmental Action Groups (Greenpeace, Sierra Club)

  14. Quick Review • Man made problems are endangering life on earth • Environmental problems are due to human overpopulation • Solutions are available…and up to us

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