Although the marijuana smokers indulged much less often, it was found that a single joint releases three times as much tar as a cigarette.
Meskipun pemakai mariyuana mengisap jauh lebih sedikit, diketahui bahwa sebatang rokok mariyuana melepaskan tiga kali lebih banyak tar daripada yang dilepaskan sebatang rokok tembakau.