cigarette sans filtre La s'affiche. histoire de la publicite du tabac (1945-1973) Gitane maïs sans filtre :

Another limitation of the study is that the participants were mostly white and in their 60s and 70s, so the smoking patterns collected in the study reflect only a particular set of age groups in the United States

Most cigarette filters are made of a type of plastic, cellulose acetate, which doesn't biodegrade and can persist in the environment for a long time

In the cigarette-making process, designated specialized cigarette-making machines were used, and the machine speed was slowed down (600-700 cigarettes per minute)

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Taken together, these findings suggest that even low, repeated exposuresthough individually smallmay have cumulative and longer-term biological effects that warrant concern