Is smoking forbidden in Islam or permissible if done away from others?

It has been scientifically proven that smoking is very harmful to health and can cause cancer. What is medically harmful is religiously forbidden by the consensus of jurists. There is no difference in its prohibition whether practiced in solitude or among people, except that its prohibition increases when practiced among people due to the harm it causes them with foul odors and the possibility of their health being affected (secondhand smoke).