Arctic pollution causing polar bears to change sex
By Charles Arthur

Polar bears, Arctic foxes and Inuit peoples are under threat from man-made toxins such as polychlorinated byphenyls (PCBs) that build up in the food chain, new research reveals.

Environmental and animal groups are calling for a global ban on the production of the chemicals to safeguard the future health of those groups. Some scientists believe the PCBs are leading to “gender-bender” polar bears in Norway and Greenland, after the discovery of a number of female bears which had both male and female sexual organs.