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The letter called health evidence about the risks of smoking controversial and noted that plenty of smokers live a long life. The letter was obtained by Judith Mackay, a Hong Kong-based anti-smoking advocate, who shared a translation of it with The Examination

There is hypocrisy at work if the government were true to its apparent beliefs it would ban smoking completely, instead of making it a pastime which increasingly can be enjoyed only by the well-off

However, far fewer studies have been done on the long-term effects of cannabis smoke

It features a three-stage filtration system, including a pre-filter, a primary filter and a High-Efficiency Activated Carbon filter