how are e cigarettes harmful The Dangerous Truth Behind E-Cigarettes Fast facts on the effects

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Dimensions: 2000 x 1174 px | 33.9 x 19.9 cm | 13.3 x 7.8 inches | 150dpi Date taken: 24 May 2005 Photographer: Steve Helber More information: This image could have imperfections as its either historical or reportage

"'We're just glad it is over'"

Nicotine is habit-forming and highly addictive

This photo of cigarettes on sale at a duty free shop in Dsseldorf, Germany, sent in by Steve W., gives us some perspective on just how successful theyve been: Here, for comparison, is a photo of cartons of Marlboros on sale in Texas: In case you cant read it, the large text above the Marlboro logo reads: Flip Top Box. Lisa Wade is a professor of sociology at Occidental College

Puff count, or the number of inhalations taken, also plays a significant role