Are electronic cigarettes safe? BBC News

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Subscribe to BBC News www.youtube.com/bbcnews Is there any medical evidence which proves that electronic cigarettes are bad for your health? Figures suggest the number of people using electronic cigarettes in Britain has trebled in the past 2 years. Subscribe http://www.youtube.com/bbcnews Check out our website: http://www.bbc.com/news Facebook: http://www.facebook.com/bbcworldnews Twitter: http://www.twitter.com/bbcworld Instagram: http://instagram.com/bbcnews