What is the primary difference between electronic cigarettes.

• Position: NOTEWORTHY - Brief article

What is the primary difference between electronic cigarettes, which first surfaced commercially in 2004, and their age-old, combustible predecessors? So-called "e-cigs" do not contain tobacco. Instead, an internal mechanism heats up liquid nicotine, which is converted to a vapor that smokers inhale. E-cigarettes do not contain tar and other additives. While the lack of smoke widely is perceived to result in fewer health problems when compared to smoking conventional cigarettes--less cough, improved ability to...