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 noun criticism is most often used to describe negative commentary about something or someone, but it's just as correct to use criticism to mean an examination or judgment.. Critics who review books and movies consider their reviews to be criticism, whether they're positive or negative. So the criticism you receive doesn't have to be all about your faults; it can actually be a pleasant experience.