While XKCD is best known for its very funny web comic, occasionally Randall Munroe, the author, uses his graphic skills for more serious purposes. Recently, he created one of the most useful charts I have seen. The chart compares radiation doses at various levels to each other and puts these dosages in terms of everyday experience.
While Munroe is quick to point out that "the author is not an expert, and that anyone potentially affected by Fukushima should always defer to the directives of regional health authorities", Munroe has consulted with experts and the chart is still worth sharing.
For more background on the chart and the sources used on the chart, click here; For a full size version of the chart, click here.