What percentage of u. s lakes is estimated to be affected by eutrophication due to human activity?

First you should know that eutrophication is the development by which a body water becomes enriched in liquified nutrients that stimulate the growth of aquatic plant life that usually can take oxygen from the water killing fishes and other animals. The percentage of US lakes affected by this process due to human activity is 65%.

if im not mistaken its a. collective emotional arousal