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The top documents tagged [leeches fish]
Impact of BODs on Fish Types of organisms Dissolved oxygen (ppm) Biological oxygen demand Normal clean water organisms (Trout, perch, bass, mayfly, stonefly)
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Water Pollution Water Pollution Chapter 11 11.5 - 11.9
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{ Fresh Water Pollution Types, Effects, and Sources of Water Pollution
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Today everybody is downwind or downstream from somebody else. -- William Ruckelshaus
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Slide 1 Fig. 19.1, p. 476 No electronic rights for this image
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