population explosion
DESCRIPTION
Population Explosion. Your Subtitle Goes Here. 4 BASIC NEEDS. AIR FOOD WATER SHELTER. AIR. Clean air is a scarce commodity Human activity means pollution in the air More pollution=more human activity=less oxygen Fossil fuels add 5.5 billion tons of carbon to the atmosphere yearly - PowerPoint PPT PresentationTRANSCRIPT
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Population ExplosionYour Subtitle Goes Here
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4 BASIC NEEDS•AIR•FOOD•WATER•SHELTER
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AIR• Clean air is a scarce commodity• Human activity means pollution in
the air• More pollution=more human
activity=less oxygen• Fossil fuels add 5.5 billion tons of
carbon to the atmosphere yearly• More people means more carbon
dioxide=less oxygen
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FOOD• The human body requires a certain
amount of calories to survive—fortunately our capacity to produce food has matched our capacity to produce kids
• As population goes up—demand goes up—capacity goes down
• By the 1980’s 11 major oceanic fisheries had been depleted to the point of collapse
• By 2008 an additional 30 nations will be unable to feed themselves
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WATER• All living things require water for
survival• More people=more demand for
water=less water• 4 of every 5 people lack access to fresh
water• As people increase, waste increases which
is usually dumped into the water
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SHELTER• Building shelters requires materials• As mans numbers increase, the availability
of resources decrease• Since World War II an area the size of China
and India has been so damaged by human activity that it has lost most of its biological activity
• 1/3 of the earth’s surface (land) on which nearly 1/5 of humanity lives is threatened by desertification
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CAUSES OF OVERPOPULATION
• SEX—OBVIOUSLY—cultural factors--like male dominated societies and demand for Boy babies
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CAUSES…• MEDICAL TECHNOLOGY—
Spending billions to cure diseases but setting up planet earth for a serious population problem
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CAUSES…• RELIGION—many religions
actively oppose birth control “every child is a gift of God”
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CAUSES…• ECONOMICS—most poor countries
have no welfare system, no social security, etc... By having many children they get a “living” retirement system. Labor intensive farming—breed your own workforce
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CAUSES…• Lack of family planning in poor
nations—either not available or not well delivered