The birth rate for boys and girls in Canada usually follows a standard pattern. 51 per cent of births are boys. 49 per cent are girls.
That ratio changes, though, when communities are exposed to a toxic substance called dioxin. That’s the finding of a new study by the IntrAmericas Centre for Environment and Health.

In Canadian towns and cities where parents were exposed to dioxin via air, as few as 46 males were born for every 54 females. Dioxin is released by some industries, such as oil refineries and paper mills.

Read the full article, published in a journal of the American Chemical Society.

Get the study highlights from Reuters news agency – Dioxin pollution leads to more baby girls: study.

Interested in which facilities are releasing dioxin in Canada? Find out on the PollutionWatch web site.