Exposure to radiation can cause adverse health effects such as radiation sickness and cancer. Significant health risks occur at exposure levels of 100 mSv or more over a short period. Radiation levels near Three Mile Island peaked at 0.5 mSv/hour and levels near Chernobyl were as high as 800 mSv during the incidents according to reports from the World Health Organization and International Atomic Energy Agency.

1. In 250 words briefly describe the adverse effects caused by
exposure to radiation. Include some specific exposure levels
associated with these significant health effects. Lastly, give
some examples of measured radiation levels associated with the
Three Mile Island incident in the U.S. and in the Chernobyl
incident in the Soviet Union. Provide your reference source(s).
(Wikipedia is not an accepted reference source.)