are cigarettes banned in the uk UK's Historic New Smoking Ban Is Almost Law — What Travelers Need to Know The United Kingdom has passed
Description
Some are contained directly in the tobacco leaf, others are produced when the cigarette burns and some have been added by the cigarette manufacturers
Does marijuana or alcohol cause more deaths

[accessed 4 Apr 2011]

In this instance, the shredded tobacco leaf is compacted into cylindrical form
The answer is unclear

Smoke contains thousands of new chemicals different from those initially burned
