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Overpopulation

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The Big Problem: Overpopulation. Over 6.6 billion people ... Environmental problems are due to human overpopulation. Solutions are available...and up to us ... – PowerPoint PPT presentation

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Title: Overpopulation


1
Overpopulation
2
Ozone Layer Depletion
  • 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

3
The Good and the Bad
The Bad
The Good
4
The Greenhouse Effect
  • 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

5
Whats 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
Deforestation
  • 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

11
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12
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13
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

14
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

15
Pollution Solutions
  • Act locally
  • Reduce usage of natural resources
  • Recycle at home
  • Support Environmental Action Groups (Greenpeace,
    Sierra Club)

16
Quick Review
  • Man made problems are endangering life on earth
  • Environmental problems are due to human
    overpopulation
  • Solutions are availableand up to us
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