Few facts about Vapor Smoking
You Want to Know
Vapor is produced from liquid or solid state that could come from original H2O water, producing mist, fog, steam, smoke or anything that clings on air particles. To produce vapor, liquid is heated above boiling point and reintroduce in air below its boiling temperature which turns in vapor or mist.
How Electronic Cigarettes Work, http://science.howstuffworks.com/innovation/everyday-innovations/electronic-cigarette2.htm