The story beyond your toilet. From ancient times, countries have chosen the sewer to get rid of household and industrial waste, yet the contaminants we flush resurface in our food chain. Fish swim through waste water dumped into rivers, while sewage sludge is spread on farmland as fertilizer. Is the sewer actually compounding our waste problems? While scientists warn of links between sewage practices and potential health risks, activists, engineers and concerned citizens challenge our fundamental attitudes to waste.