Overpopulation

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Overpopulation
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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

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The Good and the Bad
The Bad
The Good
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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

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Whats in a name?
The purpose of a greenhouse is to trap heat year
round
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Earth
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Earth
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Earth
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The Greenhouse Effect
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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

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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

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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

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Pollution Solutions

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

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Quick Review

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