Smoking is haraam, growing tobacco is haraam, and dealing in it is haraam, because of the great harm which it causes. It was narrated in the hadeeth; “There should be no causing harm or reciprocating harm. Smoking is also one of al-khabaa’ith [evil things]. Allaah described the Prophet (peace and blessings of Allaah be upon him) as (interpretation of the meaning): “… he allows them as lawful al-Tayyibaat [all good and lawful things] and prohibits them as unlawful al-Khabaa’ith [all evil and unlawful things]…” [al-A’raaf 7:157]
And Allaah says (interpretation of the meaning):
“They ask you what is lawful for them. Say: ‘Lawful unto you are al-tayyibaat…” [al-Maa’idah 5:4]