香港背景輻射濃度，較日本東京高出一倍。有學者指香港輻射濃度高是因為香港

香港背景輻射濃度，較日本東京高出一倍。有學者指香港輻射濃度高是因為香港土地有大量花崗岩，花崗岩會釋放氡氣，吸入體內衰變後會成為放射性物質
國內研究已經發現，進口的部分南非及印度花崗岩建材的氡氣溢出率為一般混凝土建材的百倍以上，這可能導致居住其中的民眾罹患肺癌率偏高

結果 (英文) 1:

Background radiation levels in Hong Kong, representing Japan Tokyo more than 1 time. Scholars refer to high radiation levels in Hong Kong because Hong Kong has a large number of granite and granite emit radon gas, inhaled decay will become radioactive materialNational studies have found that import parts of South Africa and the India of granite building materials-radon gas overflow for more than hundreds of concrete, which may lead to people with lung cancer live high rate

結果 (英文) 2:

Hong Kong background radiation concentration, more than double than that of Japan Tokyo. Some scholars refers to the high concentration of radiation in Hong Kong because Hong Kong has a lot of land granite, granite releases radon, inhaled radioactive decay will be after
domestic studies have found that part of South Africa and India radon granite building materials imports was generally concrete overflow building materials more than a hundred times, which may lead to living among people suffering from high rates of lung cancer

結果 (英文) 3:

Hongkong background radiation concentration, compared with Japan, Tokyo twice as high. Some scholars refer to Hongkong because of the high radiation concentration of land in Hongkong with a large number of granite, granite will release radon, inhaled decay will become radioactive substancesDomestic research has found that the import of radon overflow part of South Africa and India granite building materials was above 100 times the general concrete building materials, which may lead to people living in the high rate of lung cancer