Pollution may be caused by natural sources or human activities, but regardless of the cause, the result is the same. It can have detrimental effects on aquatic ecosystems as well as the health of those who depend on those sources of water, like us!
review verb (THINK AGAIN) C1 [ T ] to think or talk about something again, in order to make changes to it or to make a decision about it: The committee is reviewing the current arrangement/situation. Let's review what has happened so far.
Rather, a critical review is a thorough, usually formal discussion that uses a variety of critical-thinking tools, especially (a) logical, accurate summary; (b) discussion or analysis of arguments, implications, and responses; and (c) evaluative weighing of the quality of the writing, organization, and contents.