No need to go all the way to Japan, just head to the radon health mines in Montana. https://radonmine.com/ https://radonmine.com/ I first heard of it because

No need to go all the way to Japan, just head to the radon health mines in Montana. https://radonmine.com/ https://radonmine.com/ I first heard of it because we were visiting some Amish families and one wasn't around because they were on a trip out there.