Gabor Kovacs of 'smoke no smoke' displays e-cigarettes that his shop sells at Camden in London June 9, 2013. Puffing on slim metal tubes loaded with pale yellow liquid, two London businessmen say they... more 
Gabor Kovacs of 'smoke no smoke' displays e-cigarettes that his shop sells at Camden in London June 9, 2013. Puffing on slim metal tubes loaded with pale yellow liquid, two London businessmen say they have between their lips a cure for what the U.N. calls "one of the biggest public health threats the world has ever faced". (REUTERS/Toby Melville) less 
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Reuters | Photo By REUTERS/Toby Melville
Thu, Oct 10, 2013 8:00 AM EDT