The use of a filter in a cannabis cigarette was not advantageous since it not only filtered the tars, but also the cannabinoids. Indeed, the performance ratio was decreased by about 30% compared to the unfiltered cigarette.
L'uso di un filtro in una sigaretta di cannabis non risulta vantaggioso, in quanto non filtra solo i catrami, ma anche i cannabinoidi, cosicché l'indice di efficienza risulta del 30% inferiore alla sigaretta senza filtro.