thawing

Thawing permafrost can expose northerners to cancer-causing gas, study says

Thawing permafrost can expose northerners to cancer-causing gas, study says

Thawing permafrost might be exposing people in northern Canada to higher levels of a naturally-occurring gas that causes lung cancer, says a new study out of the U.K. Paul Glover, the study's lead researcher, said permafrost has been acting as a "hidden guardian" by keeping radon locked in the ground in the circumpolar Arctic and preventing it from travelling to the Earth's surface and accumulating in buildings.