introducing environmental science and sustainability n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Introducing Environmental Science and Sustainability PowerPoint Presentation
Download Presentation
Introducing Environmental Science and Sustainability

Loading in 2 Seconds...

play fullscreen
1 / 31

Introducing Environmental Science and Sustainability - PowerPoint PPT Presentation


  • 142 Views
  • Uploaded on

Introducing Environmental Science and Sustainability. 1. Overview of Chapter 1. Human Impacts on The Environment Population, Resources and the Environment Sustainability Environmental Science Addressing Environmental Problems. The Environment (Earth).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Introducing Environmental Science and Sustainability


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
    Presentation Transcript
    1. Introducing Environmental Science and Sustainability 1

    2. Overview of Chapter 1 • Human Impacts on The Environment • Population, Resources and the Environment • Sustainability • Environmental Science • Addressing Environmental Problems

    3. The Environment (Earth) • Life has existed on earth for 3.8 billion yrs • Earth well suited for life • Water over ¾ of planet • Habitable temperature, moderate sunlight • Atmosphere provides oxygen and carbon dioxide • Soil with essential minerals for plants

    4. Human Impacts on Environment- Population • Earth’s Human Population is at 6.9 billion • Growing exponentially • Expected to add several billion more people in 21st century

    5. World Population Clock • http://www.census.gov/main/www/popclock.html

    6. Population • 1 in 4 people live in extreme poverty • Cannot meet basic need for food, clothing, shelter, health • Difficult to meet population needs without exploiting earth’s resources

    7. Gap Between Rich and Poor • Highly Developed Countries (HDC) • Complex industrialized bases, low population growth, high per capita incomes • Ex: US, Canada, Japan

    8. Gap Between Rich and Poor • Less Developed Countries (LDC) • Low level of industrialization, very high fertility rate, high infant mortality rate, low per capita income • Ex: Bangladesh, Mali, Ethiopia

    9. Types of Natural Resources

    10. Overpopulation • People overpopulation • Too many people in a given geographic area • Problem in many developing nations • Consumption overpopulation • Each individual in a population consumes too large a share of the resources • Problem in many highly developed nations, US in particular

    11. Consumption • Consumption • Human use of materials and energy • People in HDCs are big consumers • Unsustainable Consumption • Occurs when the level of demand on a country’s resources damages or depletes the resource enough to reduce the quality of life for future generations • Caused by overpopulation and/or overconsumption

    12. Ecological Footprint • The average amount of land, water and ocean required to provide that person with all the resources they consume

    13. Ecological Footprint • Humans have an ecological overshoot

    14. Ecological Footprint Comparison

    15. Environmental Impact Affluence per person I = P A T Environmental effect of technologies Number of people IPAT Model • Measures 3 factors that affect environmental impact (I)

    16. Environmental Sustainability

    17. Environmental Sustainability • The ability to meet current human need for natural resources without compromising the needs of future generations • Requires understanding: • The effects of our actions on the earth • That earth’s resources are not infinite

    18. Day 2 Notes

    19. Tragedy of the Commons • Garrett Hardin (1915–2003) • Solving Environmental Problems is result of struggle between: • Short term welfare • Long term environmental stability and societal welfare • Common pool resources • Garrett used Common Pastureland in medieval Europe to illustrate the struggle

    20. Sustainable Development- Systems Concept • Economic development that meets the needs of the present generation without compromising future generations

    21. Environmental Science • An interdisciplinary study of human relationship with other organisms and the earth • Biology • Ecology • Geography • Chemistry • Geology • Physics • Economics • Sociology • Demography • Politics

    22. Earth System and Environmental Science • System • A set of components that interact and function as a whole • Global Earth Systems • Climate, atmosphere, land, coastal zones, ocean • Ecosystem • A natural system consisting of a community of organisms and its physical environment

    23. Earth Systems and Environmental Science • Negative feedback • Change triggers a response that counteracts the changed condition

    24. Feedback • Positive feedback • Change triggers a response that intensifies the changing condition

    25. Scientific Method

    26. Controls and Variables in Experiment • Variable • A factor that influences a process • The variable may be altered in an experiment to see its effect on the outcome • Control • The variable is not altered • Allows for comparison between the altered variable test and the unaltered variable test

    27. Five Steps to Addressing An Environmental Problem • Five steps are idealistic • Case Study: Lake Washington

    28. Assessing Environmental ProblemCase Study: Lake Washington • Large, freshwater pond • Suburban sprawl in 1940’s • 10 new sewage treatment plants dumped effluent into lake • Effect = excessive cyanobacteria growth that killed off fish and aquatic life

    29. Assessing Environmental ProblemCase Study: Lake Washington • Scientific Assessment • Aquatic wildlife assessment done in 1933 was compared to the 1950 assessment • Hypothesized treated sewage was introducing high nutrients causing growth of cyanobacteria • Risk Analysis • After analyzing many choices, chose new location (freshwater) and greater treatment for sewage to decrease nutrients in effluent

    30. Assessing Environmental ProblemCase Study: Lake Washington • Public Education/Involvement • Educated public on why changes were necessary • Political Action • Difficult to organize sewage disposal in so many municipalities • Changes were not made until 1963! • Evaluation • Cyanobacteria slowly decreased until 1975 (gone)

    31. Assessing Environmental ProblemCase Study: Lake Washington • Results