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Human Impact on the Environment

Human Impact on the Environment

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Human Impact on the Environment

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  1. Human Impact on the Environment Cost vs Benefit

  2. AIM: How have humans impacted the acidity of precipitation? • BRAIN SHAKER: What kinds of foods or drinks are acidic? • HOMEWORK: Human Impact double-quiz next Friday (5/23)

  3. Letter to a Lobbyist • Write a letter to a lobbyist of your choice to persuade them to take action against one of the causes of acid precipitation. • Use details from class and the text to support your argument.

  4. AIM: How does human activity change the environment? • BRAIN SHAKER: How do humans increase the acidity in precipitation? • HOMEWORK: Packet due tomorrow Human Impact double-quiz Friday

  5. Acid Precipitation- rain, snow, sleet or hail with a pH value less than 5.6 • Caused by: burning fossil fuels release sulfur or nitrogen into the air • Combines with water in the atmosphere to form acidic rain. • Effect: wash nutrients from the soil, hurting plant life • lowers pH of lakes, hurting aquatic organisms

  6. Acid Precipitation

  7. Ozone Layer – reduces the amount of UV light that enters Earth’s lower atmosphere Ozone Layer Depletion (thinning) • Cause: air pollution, chlorofluorocarbons (CFCs) • Effect: UV rays cause DNA damage and harmful mutations

  8. Global Warming – increase of average temperatures on Earth • Cause: increase in carbon dioxide and other greenhouse gasses • Effect: increase the rate of melting for the polar ice caps • Raises ocean water levels • Habitat loss in coastal areas

  9. Rapid changes in the Environment lead to a decrease in the number of species

  10. Habitat Fragmentation – development of human civilization leaves only patches of natural environments

  11. Preventing Habitat Fragmentation

  12. Native vs Exotic (or Invasive) Species Native Species Exotic (Invasive) Species – nonnative species Introduced species not naturally from that habitat Can damage ecosystems Threaten biodiversity • Live in their natural habitat

  13. AIM: How can we evaluate the use of alternative energy sources? • BRAIN SHAKER: Why do invasive species thrive in new environments? • HOMEWORK: Graphic Organizers due tomorrow, all exam corrections due tomorrow, QUIZ TOMORROW (FRIDAY = last day for late HWs)

  14. Write a Letter to Mayor Bill de Blasio to convert public office buildings into using an alternative energy source of your choice [8 pts] • Justify the need for alternatives to burning fossil fuels • Global warming/ Climate Change [1] • Green house gasses [1] • Environmental Impact [1] • Describe two benefits of your energy source [2] • Describe disadvantages to three other alternative energy sources [3] • EXTRA CREDIT: Include a counter argument [2]