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| SOURCES OF ENVIRONMENTAL RADON AND COUNTERMEASURES FOR ITS PREVENTION AND CONTROL |
| Zhang Ye, Cheng Yexun, Liu Qingcheng, Wang Nanping, Hou Shengli |
| China University of Geosciences, Beijing 100083 |
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Abstract This paper deals with the sources and harmfulness of environmental radon,analyses the geological background of radon in the urban district of Beijing and some basic measures for preventing and reduciang radon,and emphatically points out that indoor radon comes mainy from foundation rock and soil.
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Received: 04 January 1999
Published: 24 April 1999
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