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1 A Growing World Population

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Page 1: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

1

A Growing World Population

Page 2: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Population Curve

For Centuries, Birth and Death Rates were about Equal

Page 3: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Three reasons why population has increased since the Industrial Revolution?

1. Decrease in the Death Rate

2. Increase in Life Expectancy

3. Decrease in Infant Mortality

Page 4: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Two Changes Made this Possiblewe can thank science for both

• Changes in Agriculture have Increased the World’s food supply

• Advances in Medicines, health care and understanding and control of diseases

Page 5: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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First Big Change:Improvements in Farming & Food

• More Food is produced• Improvements in crops• Crops that are better for

people – legumes• Use of machines: more

crops with fewer people• Use of fertilizers &

pesticides • Storage of food

Page 6: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Farming in the 1800’s

Page 7: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Improvements in Farming

Page 8: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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The Green Revolution of the 1950’s

Page 9: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Fertilizers & Pesticides in the 1950’s

Page 10: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Increase in Food output in India

Page 11: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Downside of Green Revolution

Page 12: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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2nd Big Change:Changes in Health Care

• Increase in Life Expectancy

• Decrease in Infant Mortality Rate

• Decrease In Death Rate

Page 13: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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• What is a Vaccine?•  

• A vaccine contains purified fragments taken from killed bacteria or viruses. 

Some of the vaccines contain live viruses but in a very weak form that cannot

cause the disease.•  

• How does a Vaccine work?•  

• A vaccine "teaches" the immune system how to recognize and fight the

bacteria/virus before an infection develops.

Vaccines

Page 14: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Changes in Public Services

•Better Water and Sewer Systems

•Better Support Services – like aid to the poor

•Laws that protect workers

•Laws that protect the environment

Page 15: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Water Treatment Plant

Page 16: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Waste Water Treatment Process

Page 17: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Both Birth & Death Rates have declined

Page 18: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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The Developed WorldLife Expectancy

• The Developed Nations have increased Life Expectancy

• Changes in living Conditions

• Medicines that help people live longer

Page 19: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Infant Mortality in the USA

Page 20: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Infant mortality has decreased in Developing Nations too

Page 21: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Life Expectancy Developing Nations

Page 22: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Developing Regions Versus Developed Nation

Page 23: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Population Growth Rates

Page 24: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Developed & Developing Regions

Birth & Death Rates• In the developed world,

death rates have declined but birth rates have declined dramatically.

• In the developing world, death rates have declined, birth rates are still high.

Page 25: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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United Nations

Page 26: 1 A Growing World Population. 2 Population Curve For Centuries, Birth and Death Rates were about Equal

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Most Populous Countries


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