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Exhibit 8
Natural Radiation and Man-made Radiation - How Much are They?

Natural radiation and man-made radiation - How much are they?

The radiation our body normally receives is called the background radiation. On average, about 85% of this comes from natural sources, 14% from medical applications and 1% from other sources.

The various types of radiation produce different health effects on different parts of our body.

The term 'dose' is used to represent the health effect. It is normally expressed in units of millisievert (mSv). The average annual dose is about 3 mSv per person in Hong Kong.


Through What Paths will Radiation Affect UsExhibit 7
Exhibit 9 How Radiation Affects Our Body
Last revision date: <20 Dec 2012>