'Normal clean water organisms' presentation slideshows

Water Pollution

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Chapter 14 Water Pollution

Chapter 14 Water Pollution. Water Pollution. Water pollution- the contamination of streams, rivers, lakes, oceans, or groundwater with substances produced through human activities and that negatively affect organisms. Point sources- distinct locations that pump waste into a waterway.

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Chapter 21

Chapter 21. Water Pollution. Using Nature to Purify Sewage. Ecological wastewater purification by a living machine . Uses the sun and a series of tanks containing plants, snails, zooplankton, crayfish, and fish (that can be eaten or sold for bait).

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Fig. 19.1, p. 476

No electronic rights for this image. Fig. 19.1, p. 476. Water Quality. Do (ppm) at 20?C. Good. 8-9. Slightly polluted. 6.7-8. Moderately polluted. 4.5-6.7. Heavily polluted. Below 4.5. Gravely polluted. Below 4. Fig. 19.2, p. 478. Clean Zone. Decomposition Zone. Septic Zone.

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