Human population growth

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Human population growth
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Human population growth

• In the United States and developed countries, the
  current growth rate is ________

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Human population growth

• In the United States and developed countries, the
  current growth rate is very low

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Human population growth

• In the United States and developed countries, the
  current growth rate is very low
• In some developing countries, the human
  population growth is nearly _______

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Human population growth

• In the United States and developed countries, the
  current growth rate is very low
• In some developing countries, the human
  population growth is nearly 3 people per second

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Human population growth

• In some developing countries, the human
  population growth is nearly 3 people per second
• Because of this, the human population is well on
  its way to reaching ____________ in your lifetime

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Human population growth

• In some developing countries, the human
  population growth is nearly 3 people per second
• Because of this, the human population is well on
  its way to reaching 9 billion in your lifetime

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Human population growth
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Human population growth

• For most of human existence, the population grew
  ______

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• For most of human existence, the population grew
  slowly

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• About 500 years ago, the population began growing
  more rapidly because life was made easier by
  advances in _______ , ______ , and _______.

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• About 500 years ago, the population began growing
  more rapidly because life was made easier by
  advances in agriculture, industry, and medicine

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• With these advances, the human population
  experienced ____________

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• With these advances, the human population
  experienced exponential growth

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• Human population cannot keep growing
  exponentially forever because

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth

• Human population cannot keep growing
  exponentially forever because Earth and its
  resources are limited.

Human population growth
Industrial Revolution begins
Agriculture begins
Bubonic plague
Plowing And irrigation
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Human population growth
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• nonrenewable resources -

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• nonrenewable resources resources that are used
  faster than they are formed.
• Examples -

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• nonrenewable resources resources that are used
  faster than they are formed.
• Examples oil, coal, natural gas

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• renewable resources -

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• renewable resources resources that cannot be
  used up or can be replenished over time faster
  than they are used up
• examples -

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• renewable resources resources that cannot be
  used up or can be replenished over time faster
  than they are used up
• examples wind energy, solar energy, drinking
  water, lumber/paper

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• ecological footprint -

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• ecological footprint the amount of land
  necessary to produce and maintain enough food and
  water, shelter, energy and waste

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• ecological footprint the amount of land
  necessary to produce and maintain enough food and
  water, shelter, energy and waste
• The size of an ecological footprint depends on a
  number of factors

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• ecological footprint the amount of land
  necessary to produce and maintain enough food and
  water, shelter, energy and waste
• The size of an ecological footprint depends on a
  number of factors
• amount and efficiency of resource use
• Amount and toxicity of waste produced

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• The average U.S. citizens ecological footprint
  covers an area larger than

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• The average U.S. citizens ecological footprint
  covers an area larger than 24 football fields.

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• The average U.S. citizens ecological footprint
  covers an area larger than 24 football fields.