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Understand how our Water gets Polluted

Understand how our Water gets Polluted. You will be able to understand how and why chemicals create problems in our water supply You will understand the benefits and risks of using chemicals. Thinking Questions?. Do you think all poisons to kill pests should be restricted?

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Understand how our Water gets Polluted

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  1. Understand how our Water gets Polluted • You will be able to understand how and why chemicals create problems in our water supply • You will understand the benefits and risks of using chemicals

  2. Thinking Questions? • Do you think all poisons to kill pests should be restricted? • What happens when a chemical is over used? What “CHANGES” occur? • Why would NC allow pig farms to have sewer ponds knowing the potential risk they are to the environment? • What are the benefits/risks to using chemicals? • What CHANGES can you make in your daily habits to reduce your exposure to chemicals?

  3. 4 types of Water pollutionToxins (poisons)

  4. 4 Types of Water pollutionSediment (Turbidity)

  5. 4 Types of Water PollutionNutrients (fertilizers/waste)

  6. 4 Types of Water PollutionBacterial (improper waste removal)

  7. 5 Main Effects of any Chemical Usage • Dose- amount of chemical initially sprayed or release to environment • Potency- amount of chemical needed to perform desired action (lab tests determine this) • Exposure Time- how long chemical lasts or stays “Active”; most chemicals now designed to biodegrade or break down over time • Individual Susceptibility- how each organisms responds to chemical; determined by genetics • Concentration- How chemical levels vary throughout usage and food chain of ecosystem; creates biomagnification issues

  8. DDT: Why was DDT used?

  9. DDT Spraying: Why use DDT?

  10. Reaction to Polluted Waters

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