What worries me most about sewage pushed into the environment from various sources is not the viruses, bacteria, pathogens and algea blooms. Im more concerned

What worries me most about sewage pushed into the environment from various sources is not the viruses, bacteria, pathogens and algea blooms. Im more concerned about the heavy metals, murcury, lead, arsenic, aluminum, polonium, pharmaceuticals, cadmium, poisons, all which good human bodies throw out because they cause all sorts of problems which are hard to trace.