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Understanding Water Pollution and Chemical Risks

Learn how chemicals impact our water, understand water pollution types, and explore effects of chemical usage. Answer thought-provoking questions.

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Understanding Water Pollution and Chemical Risks

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Presentation Transcript

  1. Understanding 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. What is Biomagnification?

  11. Reaction to Polluted Waters

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