The greatest damage to fish stocks has happened in the last fifty years. During this time, large, organized fishing fleets have become weapons of mass marine destruction. These "giant factory ships" use GPS and sonar to locate large schools of their target fish. These trawlers are equipped with massive nets and long, hooked fishing lines that can catch huge volumes of fish at once. With processing plants right on board, these ships package and freeze tons of fish in one operation. The biggest, fastest, and most technologically advanced fishing trawlers wreak havoc as they float along the ocean’s surface.What is one way that the author shows bias toward the topic?