What is another cause of artificial eutrophication?

Since you haven't told us what other causes are, it's impossible for us to find "another cause."

Please tell us the causes you've found -- and we'll try to help you.

fertilizer from farms, lawns, and gardens are the largest source of nutrients that cause artificial eutrophication.

BUT! What is ANOTHER! cause of Artificial Eutrophication???

http://www.google.com/search?hl=en&ie=ISO-8859-1&q=artifical+eutrophication&btnG=Google+Search

How about run off of manure from farm animals?

o.k thanks! :')