Half of all the male fish in lowland rivers are changing sex as a result of pollution, alarming new official research suggests. The findings raise serious questions as to whether the pollution is getting into drinking water and affecting human fertility.
The research – to be published by the Environment Agency this month – shows that male fish are developing female characteristics in rivers all over the country. In some stretches all the male fish have been feminised.
Scientists conducting the research blame a particularly powerful form of oestrogen in urine from the contraceptive pill, which is flushed through sewage works into the rivers. Some fear that the "exquisitely potent" chemical may be contaminating part of the one third of all of the country's drinking water that is taken from rivers. (...)