I wonder just how bad those essential oil diffusers are, compared with, say, smoking, laser printers, and tyre microplastics.
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Who would not want their print out to smell like fresh apple pie?
and yes I am one of those people who enjoyed the smell of freshly laser printed pages
Maybe offer unique toner scents to companies as part of their brand identity. Imagine all letters from Jack Wolfskin smelling like pine cones, or the acceptance letter from a surf school smelling like the ocean.