[likpok]

The big issue with smoking is not the nicotine. It is the tar/additives that make their way to your lungs and give you cancer.

[furburger]

actually one common form of nicotine is in fact a deadly poison

[Radix]

Why would anyone downvote this guy. It's sourced.

http://en.wikipedia.org/wiki/Nicotine#Toxicology