Industries produce waste that can affect the: 1  pH of water (whether it is acid, neutral or alkaline); 2  colour of water; 3  amount of nutrients (increase in nutrients can cause eutrophication);
Generally, the purpose of a review is to analyze critically a segment of a published body of knowledge through summary, classification, and comparison of prior research studies, reviews of literature, and theoretical articles.
The summary of a lesson, given by the class, is a test of the effectiveness of instruction. College Teaching Paul Klapper Each student should be quizzed on his reading, or should be required to give a summary of it.