Does smoking cigarettes and hookah invalidate fasting?

Does smoking cigarettes and hookah invalidate fasting? What if we are in a place where people smoke?

Dear Brother / Sister,

The decree depends on whether the person breathes in the smoke voluntarily or involuntarily. If a person breathes in the smoke voluntarily, his fasting is invalidated; he needs to perform both qada and kaffarah (perform fasting for sixty-one days).

The pleasure-giving smoky substance of tobacco products like cigarettes and hookah and all of the substances that are taken as an addiction like morphine are prohibited while fasting. If one of them is taken when a person is fasting, his fasting is invalidated.     

The fasting of a person who breathes in the smoke of a cigarette or hookah that somebody else is smoking is not invalidated if he breathes it in involuntarily. For, it is impossible to avoid it.

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