Traces of Radioactive Iodine found all around the world now

I was searching for an article I found late last night that says that radioactive iodine is being found in traces all over the earth. I couldn't find again that one this morning. However, I did find this one from Canada.
 
http://www.owensoundsuntimes.com/ArticleDisplay.aspx?e=3055004

Trace of radiation from Japan detected in area

By THE SUN TIMES

Updated 6 days ago

Air monitoring by Bruce Power has picked up "just barely above detectable levels" of radioactive iodine 131 from Japan's heavily damaged Fukushima Daiichi nuclear power complex, Murray Elston, the company's vice-president of corporate affairs, said Thursday.

The findings -- "very, very small amounts" -- are in line with what is being reported in other parts of Canada and the United States, he said.
Bruce Power has two sets of air monitoring units, on-site and off. Filters from them are usually taken out quarterly or monthly, depending on what is being tested for. Filters normally taken out quarterly were collected "a couple of days early . . . to see if there was anything they could detect as a result of Japan," Elston said.
End quote:
The problem with radioactive iodine is that it takes very little to cause thyroid cancer in people. This shouldn't be a problem once Fukushima is cemented in for awhile, but because this radioactive iodine is literally everywhere in traces, it is likely that some people will get thyroid cancer worldwide from this, especially if larger clouds of the stuff hits one area or another on earth as the winds take it around the northern hemisphere in a generally easterly direction. However, since radioactive iodine has only an 8 day half life that means that in 8 days it is only at half strength of radiation, and at 16 days it is only at a quarter strength radiation and at 24 days (enough to travel around the world twice) it will be only at an eighth strength radiation.