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HippoCampus Environmental Science 6 Online
OpenStudy (anonymous):

Dissolved oxygen (DO) measurements of 10 ppm were recorded in a natural stream just before a sewage spill. The following week, DO in the same location was recorded to be 1 ppm. What is the probable cause of this change in DO? increased bacterial decomposition of the waste increased carbon dioxide production by algae increased turbidity causing an increase in gas solubility increased oxygen production by algae increased pH levels due to organic waste

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