system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What chemicals are added to cigarettes and what is their purpose?
gpt
Be aware those "there are 500 dangerous chemicals in cigarette smoke" ads are highly misleading.  If you burn just about **any** organic material, a lot of chemicals get created, and most can be dangerous under the right circumstance, a campfire would produce about as many.  Water and carbon dioxide are both "chemicals" and "dangerous", and both are produced by cigarettes.

Make no mistake, smoking is really, really bad for you, but that statement is mostly propaganda design to use people's ignorance about "chemicals" against them.