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Warm Up: 5/7 (back of NB)

Warm Up: 5/7 (back of NB). What is the difference between point-source pollution and non-point source pollution? Which is easier to clean up? Explain why. It’s YOUR fault!. Today’s Key Words. Pollutant, point- source pollution, non-point-source pollution, algal bloom, stewardship.

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Warm Up: 5/7 (back of NB)

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  1. Warm Up: 5/7 (back of NB) What is the difference between point-source pollution and non-point source pollution? Which is easier to clean up? Explain why.

  2. It’s YOUR fault!

  3. Today’s Key Words Pollutant, point- source pollution, non-point-source pollution, algal bloom, stewardship

  4. Pollution Most human activity releases some form of pollution. A pollutantis any substance or form of energy that can cause harm to the environment and make it unfit for organisms. Pollutants include: toxic chemicals, human and animal wastes, and fertilizers and pesticides. All pollutants can reduce water quality and damage ecosystems. Preventing pollution is the best and least expensive way to protect Earth’s waters.

  5. Point-Source Pollution Point-source pollution comes from a single identifiable site. Possible Sources: • Damaged wastewater pipes or systems • Accidental release of raw sewage from wastewater treatment plants • Leaking underground oil tanks • Release of chemicals from paper mills or other industry into streams • Release of dishwater or sewage from homes directly into water systems • Release of heated water from power plants or industrial sources into streams

  6. Non- Point Source Pollution Non- Point Source Pollutioncomes from many places or a source that is not easily identified. Possible Sources: • chemical run-off from agricultural fields, golf courses, and lawns • Waste run-off from feedlots • Soil and silt from farms • Sand, grit, oil, and gasoline from city streets • Salts from irrigation or farm fields • Mercury pollution from coal- burning plants • Acid rain

  7. Nutrients and Water Pollution • Nutrients contribute to both types. • Excess nutrients lead to Algal Blooms. • Algal blooms block light from reaching plants farther down in the water. • Another type of algae can produce a TOXIN for fish; can also be harmful to humans. • This is known as Pfiesteria poisoning. • Excess nutrients can lead to lower oxygen levelsin the water.

  8. Complete the following chart:

  9. Complete the following chart:

  10. Pollution of Groundwater • Rainwater can carry pollutants into the soil and into groundwater systems. • Wells can pump polluted water into homes.

  11. Ways To Reduce Water Pollution Stewardship is the following of practices that protect Earth’s resources. • Reduce use of fertilizers and pesticides on lawns. • Keep vehicles in good working order, making sure they do not leak oil, gas or other fluids. • Keep storm drains clear of debris. • Others?

  12. Homework • Illustrate a picture of your house and feature the following: • 3 examples of Point-source pollution • 3 examples of Non-Point- source pollution

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