man smoking cigarette aesthetic Guy Royalty-Free photo: Close-up photography of

According to the Environmental Protection Agency , this number reflects how well the appliance filters three key pollutants of varying particle size: smoke (0.091.0 microns), dust (0.53.0 microns), and pollen (5.011.0 microns)

"It's become a norm and so it is very difficult to fight it." All pictures copyright.

Katherine Devlin, president of the industry trade association, admitted that there was uncertainty about what is allowed in e-cigarette advertising, but said her association is helping the Advertising Standards Authority formulate specific guidance by the middle of the year

There are concerns over both the long-term effects and the risk of getting new users hooked on nicotine and eventually onto smoking