A neon sign advising people to breathe responsibly is seen at the Bompas and Parr's Architecture Bar in London, Britain, July 31, 2015. Visitors to the bar, dressed in protective ponchos, walk into a ... more 
A neon sign advising people to breathe responsibly is seen at the Bompas and Parr's Architecture Bar in London, Britain, July 31, 2015. Visitors to the bar, dressed in protective ponchos, walk into a breathable cocktail cloud composed of spirits and mixer at a ratio of 1:3. REUTERS/Peter Nicholls less 
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Reuters | Photo By PETER NICHOLLS / REUTERS
Fri, Jul 31, 2015 4:13 PM EDT