Karin Vitzthum sets out the risks of vaping and whether it can help people stop smoking.
Germany's drug commissioner says that nicotine represents the country's biggest substance risk. She wants to ban outdoor advertising for cigarettes and tobacco, but some within her own party don't want to kick the habit.
Research has shown that reducing nicotine levels means people smoke less often. US regulators now want to shift people toward e-cigarettes.
Ever since the mobile phone entered our lives in the new millenium, anxieties about its ill effects have abounded. But what do we actually know about the health risks of mobile phones?
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