Question : What is the ruling on smoking shisha or cigarettes just outside the mosques and Islamic places of worship?
Answer : It is permissible to smoke in the places adjacent to the mosques and Islamic places of worship.
Question : Is smoking weed (hasheesh) prohibited?
Answer : Yes, it is prohibited as all intoxicants are prohibited to consume.
Drug Usage
Question : Many youth today use drugs like marijuana. They claim that it does not cause intoxication and thus can be viewed the same way as tobacco. Please provide us with a clear ruling of the validity of marijuana.
Answer : It is impermissible to consume intoxicating material whether they are fluids like wine or dry like hashish and other such drugs. It is also impermissible to consume non-intoxicating substances that cause addiction if such an addiction harms the individual in a severe way that leads to trouble, scandals or humiliation.
Question : What is the position of smoking cigarette, since it has real side effect, and WHO - World Health Organization - warns that Tobacco smoker are liable to die young?
Answer : Smoking cigarettes is not prohibited since it is not prohibited to consume harmful things. Yes, it is prohibited to consume what leads to direct and immediate major harm to the human's health like getting sick with incurable kind of disease or lose of an organ or death.
Question : I want to know if smoking Shisha is prohibited?
Answer : Smoking tobacco whether it was in Shisha or cigarette is permissible.
Smoking Cigarette
Question :

Does smoking cigarettes invalidate one’s fast?

Answer :

Yes, it does, based on compulsory precaution.