About 38 per cent of the city's background radiation comes from the air in the form of radon, a gas which enters the lungs as particles and cannot come out. Photo: Bloomberg

Hong Kong’s background radiation levels ‘astounding’, says former top official

Former official takes readings almost a third higher than world average

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About 38 per cent of the city's background radiation comes from the air in the form of radon, a gas which enters the lungs as particles and cannot come out. Photo: Bloomberg
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Ernest Kao

Ernest Kao

Ernest is a reporter at the SCMP. He mainly covers environment, energy, science and urban planning and development issues.