I went to Zhoushan and saw that the water in the East China Sea was yellow and dirty. Is it because the sewage from the Yangtze River has polluted the East China Sea?

The Yellow River water has nothing to do with the Yangtze River. It is because of industrial pollution and domestic pollution and the number of ships. The yellow turbid seawater you see is related to the sediments in the offshore area. However, when I was 6.7 years old, I saw that the sea was clear and there were many people swimming in it. After 10, there were fewer fishermen, and now there are no fishermen. I really watched the sea go muddy step by step. Now Zhoushan has to go to places like Dongji and Shengsi to see the clear water, and swimming can only go to the scenic beaches of Zhujiajian Island Island and Putuo Mountain. I miss picking up shells at the seaside when I was a child, but now I can only pick up garbage at the seaside. I think man-made pollution is the most direct cause of seawater yellowing.