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.
A user review refers to a review written by a user or consumer for a product or a service based on her experience as a user of the reviewed product. Popular sources for consumer reviews are e-commerce sites like Amazon.com or Zappos, and social media sites like TripAdvisor and Yelp.