For instance: maraijuana smell gets through a plastic bag. How does this work?
Plastic is not air tight or air proof Baggies are made from a thin plastic the thicker it is the less air can escape, that's why when you put food in a zip lock it gets frost inside or it, !
have you ever seen a balloon wrinkle and wither over time? this is because the air molecules move through the woven structure of the latex balloon and are released, the weave is extremely tight, and that's why it takes a long time for the balloon to loose air. the same hapens with a plastic bag.
