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.
As a verb, critique means to review or examine something critically. As a noun, a critique is that review or examination, like an art essay or a book report. The French version of this word is spelled the same (meaning the art of criticism) and came from the Greek kritike tekhne (the critical art).