AFP: WHO slashes safety limits of radioactive radon - 0 views
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The World Health Organization has slashed the safety limits of radon to a tenth of its current level, noting that the naturally occurring radioactive gas causes up to 14 percent of lung cancer cases. "In view of the latest scientific data, WHO proposes a reference level of 100 becquerels per metric cube to minimize health hazards due to indoor radon exposure," said the UN health agency in a report published this week. "However, if this level cannot be reached under the prevailing country-specific conditions, the chosen reference level should not exceed 300 becquerels per metric cube," it added. Becquerel is a measuring unit for radioactivity and reference levels represents the maximum accepted radon concentration in a residential dwelling. A previous WHO report published in 1996 had fixed the reference level at 1,000 becquerels per cubic metre. After smoking, radon is the second biggest cause of lung cancer, killing tens of thousands of people a year, said the WHO.