It takes someone who doesn't clean up
to be a smoker although he may clean his
house and polish his own car very seriously.
When it comes to other people's property
such as air, streets, garbage bin etc, they
don't care.
Someone who doesn't smoke has to clean
it all up.

自分の家や部屋や車はきれいにしているかも知れないけど、
スモーカーたちは灰皿も、道も、みんなの共有の空気も
汚すことは気にしていないらしい。

そうじゃないと、こんなことできない。
結局、そうじするのは、吸わない人。