human population growth and natural resources
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Human Population Growth and Natural ResourcesTRANSCRIPT
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16.1 Human Population Growth And Natural Resources
Vidya Vikas Universal College Of Commerce
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16.1 Human Population Growth And Natural Resources
Names of students
• Deep Patel 06• Sumedh Pawar 07• Archana Vishwakarma 08• Soni Chauhan 09• Priya Vishwakarma 10
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16.1 Human Population Growth And Natural Resources
Index
• Key concept • Limiting factors• Earth’s Human population continues to grow.
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16.1 Human Population Growth And Natural Resources DNA:
2. Explain what is going on in the cartoon below:
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16.1 Human Population Growth And Natural Resources
KEY CONCEPT As the human population grows, the demand for Earth’s resources increases.
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16.1 Human Population Growth And Natural Resources
Limiting Factors• Birth & death rates
eventually balance– Factors: Disease, food,
predators, climate, space, mates
• Populations become stable
• Carrying Capacity: greatest number of individuals that a population can sustain
• What stage is the human population in?
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16.1 Human Population Growth And Natural Resources
Earth’s Human population continues to grow.
• Earth’s human carrying capacity is unknown.
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16.1 Human Population Growth And Natural Resources
• Technology has helped to increase Earth’s carrying capacity.– gas-powered farm equipment– medical advancements– clean water– public assistance
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16.1 Human Population Growth And Natural Resources
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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16.1 Human Population Growth And Natural Resources
The growing human population exerts pressure on Earth’s natural resources. • Nonrenewable resources are used faster than they form.
– coal– oil
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16.1 Human Population Growth And Natural Resources
• Renewable resources cannot be used up or can replenish themselves over time.– wind– water– sunlight
• Growing use of nonrenewable resources may lead to a crisis.
• Resources must be properly managed.
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16.1 Human Population Growth And Natural ResourcesEffective management of Earth’s
resources will help meet the needs of the future. • Earth’s resources must be used responsibly.
• Careless use of resources makes them unavailable to future generations.
• Easter Island isan example ofirresponsibleresource use.
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16.1 Human Population Growth And Natural Resources
• An ecological footprint is the amount of land needed to support a person.
• The land must produce and maintain enough– food and water– shelter– energy– waste
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16.1 Human Population Growth And Natural Resources
• Several factors affect the size of the ecological footprint.– amount and efficiency of resource use – amount and toxicity of waste produced
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16.1 Human Population Growth And Natural Resources
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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16.1 Human Population Growth And Natural Resources
• Act locally• Reduce usage of natural resources• Recycle at home• Support Environmental Action Groups (Greenpeace, Sierra
Club)