Blog 8 Your choice talk about something you learned or ask a question about something that is confusing you

l leared poplution is a thing that quite complicate,there are a lot  of  factors which can affect it by huge impact.For example,fish's amount is depend on algae's amount,if algae is vanished by human's collection.As a result,fish will become less as well.Also,if there are some big fish which depend on that fish,their amount will decrease,too.Therefore,l think it will be really detrimental to kill some small living things which you think they are not important because it may be plays a major role in a big ecology.l also wondering whether people can create an almost ideal conditions which can help some endangered animals.