Big Tobacco Lights Up e-Cigarettes
E-cigarettes, more formally electronic nicotine delivery systems, were introduced in 2007. They are battery powered, cigarette shaped devices that vaporize nicotine so that it can be inhaled. E-cigarettes are currently a relatively tiny market. In the United States they accounted for about $500m (£330m; €390m) in sales last year, perhaps 0.5% of tobacco receipts.