Unfortunately

radiation has been found off the coast of Canada.
Because of radiation, creatures in the ocean would get hurt and die.
So fishermen of not only Japan but also Canada get angry.

Radiation does have negative effects on human body.
After Japanese people got injury by atomic bomb in 1945, some parts of their body
gradually stopped working and one month later, most of them died.

The radiation we have today is not so strong, but I think it influences human body.
And it is spreading out from Japan to all over the world.
Therefore, it is important to know which places already got radiation.

http://rt.com/news/247349-fukushima-radiation-canada-coast/