- The e-cigarette industry is worth $2.7 billion worldwide
- E-cigarettes satisfy urges for nicotine whilst removing exposure to the tar and toxins when burning
- Some are concerned about e-cigarette use among adolescents
Vital Signs is a monthly program bringing viewers health stories from around the world.
(CNN)It's a portable piece of technology providing seemingly bottomless access to a drug craved by more than 1 billion people worldwide -- nicotine. That craving is caused by smoking tobacco but is now being increasingly satisfied by e-cigarettes and the trend to "vape" instead of smoke.