Recently, there have been more and more floating objects on the sea, and various marine debris floated to the shore with the ebb and flow of the tide, or sank to the bottom of the sea or were salvaged by fishing nets, which seriously affected the fishermen's sea operations. When the tide ebbs on our clam hill, there are also marine debris of different sizes on the beach, including household items, waste nets, and many branches and woods covered with aquatic plants. Seeing this situation made me feel deeply, who caused these? It's all us humans!