The first national survey of 42 rivers by the UK Environment Agency has just been completed and it found that a third of male fish are growing female reproductive tissues and organs. Effects were most pronounced in younger fish, raising grave implications for future stocks. Scientists now fear that seals, dolphins, otters, birds such asperegrine falcons and even honey bees are heading towards a unisex existence that would lead to extinction. Blame has fallen on the increasing prevalence of a group of chemicals known as endocrine disruptors. These are found in plastics, food packaging, shampoos and pesticides and accumulate in the environment.