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Title:How Radiation Threatens Health

Author:Nina Bai

Source:Scientific American, 15 March, 2010

Summary:

The radiation leaks at Fukushima makes people feel worried, and it’s neceary to know that the health effects caused by radiation exposure depend on its level, type and duration.Every person is exposed some background radiation from natural but only beyond this level people can get radiation sickne.At the same time, the radiation which takes different forms is produced by different heavy isotopes.On the other hand, the exposure time is so important that high single dose of radiation can do much more harm to human than the same dosage accumulate overtime.Last but not least, the government should remember the Chernobyl’s leons but we’d better not do too many extra measures to make people feel scared.(124 words)