I saw this graphic the other day that puts into perspective various sources of radiation exposure (from xkcd, but it's not a joke...) I didn't realize that the

I saw this graphic the other day that puts into perspective various sources of radiation exposure (from xkcd, but it's not a joke...) I didn't realize that the lowest levels clearly linked to increased risk of cancer were so high. http://xkcd.com/radiation/ http://xkcd.com/radiation/