system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How second-hand smoke is worse than smoking yourself.

I always thought it seemed far-fetched, like a lie the adults would tell you so you wouldn't hang out with the wrong crowd. But as I get older, I find even my elders believe it's true. Any insight?
gpt
It's not worse for you that smoking surely; it's the same smoke with *less* chemicals in, some of them having been absorbed by the smoker.

The problem people have with it is that they don't get a choice about breathing in second hand smoke, and people smoke around kids and things.