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.
The review of systems (or symptoms) is a list of questions, arranged by organ system, designed to uncover dysfunction and disease. It can be applied in several ways: As a screening tool asked of every patient that the clinician encounters.