The thumbnail may be misleading, see this page for affected products:
Consumers who have these affected products should immediately stop using them and dispose of them in accordance with municipal electronic waste requirements.
Consumers should only purchase electronic radon monitors that have passed performance testing by the Canadian National Radon Proficiency Program (C-NRPP), the Canadian radon certification program recognized by Health Canada. Health Canada provides guidance for measuring radon in homes: Guide for radon measurements in homes - Canada.ca.
To learn about ways to measure the radon gas level in their home with an approved radon detector and how to reduce the radon level if it is high, consumers should visit the following website: Take Action on radon.
My friends mom died from the (or one of the few) lung cancer you can get even if you were never a smoker. Her sewing room was in the basement and they think it may have been due to above average radon levels.
1 in a million chance or something, but apparently more likely with exposure to some things, including radon.
is this something to worry about outside of canada, or is canada just particularly uranium-rich or something?
Actually yes. Only Poland is higher than many parts of Canada per this site, and Czech, Finland, and Romania are roughly the same depending on where in Canada you look:
https://evictradon.org/radon/radon-in-canada/
That is crazy, wow.
https://health-infobase.canada.ca/datalab/radon-blog.html
It’s something that can happen everywhere, but it depends on soil type in your area.
Some places are more prone to radon, but it can happen anywhere.
I think it’s well known in Canada just because the country has always been a pioneer in geoscience due to its vast territory… Then again maybe there’s more risk in Canada.