The glass stops a percentage of
the UV. Very few plain or even lightly tinted types of glass do much to stop UV. If they did, your car would stay a
lot cooler during the summer. That's also why sunglasses are UV rated, some better than others, because glass by
itself does not block all the UV. As a matter of fact, it's better at stopping Infrared. You can get a suntan and
possibly a sunburn through glass but it will take longer than otherwise.
Pheromones in dark tinted glass are
much safer than in clear glass but you are better off being safe and keeping them out of the sun as much as
possible.
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