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Human population

Population Growth. Human population. Why is human population growth an environmental problem?. Fill It In …. Sketch a graph of human population growth:. Industrial Revolution. Causes of human population growth. Agricultural Revolution

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Human population

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  1. Population Growth Human population Why is human population growth an environmental problem?

  2. Fill It In … • Sketch a graph of human population growth: Industrial Revolution

  3. Causes of human population growth • Agricultural Revolution • People settle into communities and more people were needed for division of labor • More reliable food supply can support a larger population

  4. Causes of human population growth • Industrial Revolution • In the early 20th century technological advancements led to improvements in medicine and sanitation, allowing for an increased birth rate and decreased death rate.

  5. Causes of human population growth • Urbanization (development of cities) leads to economic and social development which influence human populations.

  6. Effects of human population • Increased pollution - air, water, and land • ALL pollution problems relate back to overpopulation. • Pollutants are produced as waste products from human activities, such as burning fossil fuels, mining, and use of consumer goods.

  7. Effects of human population • Solid waste requires disposal in landfills or incineration.

  8. Effects of human population • Decreasednatural resources, especially nonrenewable resources (available only in limited amounts) • Ex. fossil fuels, minerals, metals

  9. Effects of human population • Increased land use - leads to loss of habitat for other species.

  10. Census data • Demographers construct histograms to use in predicting future population growth trends field called “demography” Developing & Developed & Developed & Growing Stable Decreasing

  11. Fill It In … Draw the three basic shapes: Increasing - Stable - Decreasing -

  12. Solution • ZPG - zero population growth (birth rate = death rate) • Limit number of births per family by offering tax incentives • Ex. China • Make birth control and family planning more available • Educate public and our political leaders =

  13. Solution • Conservation - wise and careful use of resources through environmental stewardship • Twenty percent of the world’s population uses more than fifty percent of the world’s resources.

  14. Solution • People in developed countries (like the U.S.) can decrease resource use by the 3 R’s: • Reduce - use less materials; for example, buying products that have less packaging • Reuse - use products more than once; for example, bring lunch in Tupperware instead of one-use containers • Recycle - return products to be re-processed; for example, old tires are used to make track surfaces

  15. Solution • Sustainability ensuring the availability of resources and a stable environment for future generations

  16. Fill It In … Give an example of one human action that is NOT sustainable:

  17. Check Yourself! • What were three causes of human population growth? • Why does human population growth lead to increased pollution? • How do people, particularly those in developed countries, need to lessen the impact of human population growth? • Why is the pyramid-shaped histogram characteristic of a growing population?

  18. Check Yourself! • What were three causes of human population growth? AGRICULTURAL REVOLUTION, INDUSTRIAL REVOLUTION, & URBANIZATION • Why does human population growth lead to increased pollution? • How do people, particularly those in developed countries, need to lessen the impact of human population growth? • Why is the pyramid-shaped histogram characteristic of a growing population?

  19. Check Yourself! • What were three causes of human population growth? AGRICULTURAL REVOLUTION, INDUSTRIAL REVOLUTION, & URBANIZATION • Why does human population growth lead to increased pollution? POLLUTANTS ARE PRODUCED AS WASTE PRODUCTS FROM HUMAN ACTIVITIES • How do people, particularly those in developed countries, need to lessen the impact of human population growth? • Why is the pyramid-shaped histogram characteristic of a growing population?

  20. Check Yourself! • What were three causes of human population growth? AGRICULTURAL REVOLUTION, INDUSTRIAL REVOLUTION, & URBANIZATION • Why does human population growth lead to increased pollution? POLLUTANTS ARE PRODUCED AS WASTE PRODUCTS FROM HUMAN ACTIVITIES • How do people, particularly those in developed countries, need to lessen the impact of human population growth? USE THE THREE R’S AND SUSTAINABLE ACTIONS • Why is the pyramid-shaped histogram characteristic of a growing population?

  21. Check Yourself! • What were three causes of human population growth? AGRICULTURAL REVOLUTION, INDUSTRIAL REVOLUTION, & URBANIZATION • Why does human population growth lead to increased pollution? POLLUTANTS ARE PRODUCED AS WASTE PRODUCTS FROM HUMAN ACTIVITIES • How do people, particularly those in developed countries, need to lessen the impact of human population growth? USE THE THREE R’S AND SUSTAINABLE ACTIONS • Why is the pyramid-shaped histogram characteristic of a growing population? BIRTH RATE IS HIGHER THAN DEATH RATE (BOTTOM IS BIGGER THAN TOP)

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