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Understanding Renewable and Nonrenewable Resources: Impacts and Alternatives

This chapter explores the critical distinction between renewable and nonrenewable resources, highlighting their importance for environmental sustainability. It covers fossil fuels, including coal, oil, and natural gas, and discusses alternative energy sources such as hydroelectric, wind, nuclear, geothermal, and solar power. The chapter also addresses various types of pollution, including water pollution and the greenhouse effect, emphasizing the consequences of human activity on natural resources. Understanding these concepts enables individuals to promote conservation and reduce resource consumption effectively.

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Understanding Renewable and Nonrenewable Resources: Impacts and Alternatives

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Presentation Transcript

  1. Chapter 12 Section 1: Resources

  2. Objectives: • Compare renewable and nonrenewable resources • List uses of fossil fuels and alternatives • Describe types of pollution • Understand the Greenhouse effect

  3. Mastering objectives will help me: • Recognize ways you can reduce your use of natural resources • Understand how you can promote conservation

  4. Natural resources: the parts of the environment that are useful or necessary for the survival of living organisms. • Renewable resource: any natural resource that is recycled or replaced constantly by nature. • Non-renewable resource: natural resources that are used up more quickly than they can be replaced by natural processes. • Fossil fuels- fuels formed in the Earth’s crust over hundreds of millions of years

  5. Natural Resources • Two types: renewable and nonrenewable

  6. Renewable Resource • Includes: water, sunlight, air, crops • Can go into short supply under certain circumstances, like a drought

  7. Nonrenewable Resource • This includes: plastics, paints, and gasoline (made from petroleum or oil)

  8. Fossil Fuels • Coal, oil, and natural gas are fossil fuels. • Using these causes many environmental problems • they require mining to retrieve them

  9. Alternatives to Fossil Fuels

  10. Water Power • hydroelectric power • Downside: environmental problems, building dams and obstructing wildlife

  11. Wind Power • Wind turns the blades of a turbine which powers a generator • Downside: electricity can only be produced when wind is blowing

  12. Nuclear Power • Nuclear energy is released in a chemical reaction • Downside: uranium is radioactive, and it is a nonrenewable source that must be mined

  13. Geothermal Energy • Heat within the Earth’s crust • Uses steam to produce electricity • Downside: only available near geysers or volcanoes

  14. Solar Energy • Using the energy from the sun to produce electricity • Downside: highly expensive; can store heat throughout the day to give electricity at night, but what if there is no sun for a few days?

  15. Solar Cells • Photovoltaic (PV) cells need sunlight to produce electricity • Downside: expensive to use for large things, and does not store energy

  16. Chapter 12 Section 2: Pollution

  17. Pollution A pollutant is a substance that contaminates the environment.

  18. Greenhouse Effect • This is the heat trapping feature of Earth • Draw and label figure 13 on page 370

  19. Global Warming and Ozone Depletion • Temperature collected over the past 100 years shows that the average temperature is rising. • No one knows if this is caused by humans or just the Earth’s natural cycle. • The ozone layer absorbs most of the harmful ultraviolet radiation from the sun. • The ozone layer temporarily thins each year over the polar regions during the spring. This is called ozone depletion.

  20. Water Pollution • Can happen by dumping litter or waste materials into rivers, lakes, and oceans. • Rivers bring pollutants to oceans, and oceans are polluted by oil spills.

  21. Hazardous Wastes • They include pesticides, oil, petroleum based solvents, and radioactive waste from power plants and hospitals.

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