5 links have been added on 2 ideas about #odor.
  1. Israel has done it. It could come in handy for detecting drugs, weapons, and explosives.
    https://neurosciencenews.com/olfactory-sensor-robot-22283/

  2. This mosquito repellent spray with pleasant-smelling essential oils is a great alternative.

  3. Check out this Japanese brand of mosquito coils. They are hyped for having some rather pleasing scents.

  4. The odor from burning mosquito coils is not only pungent but can also be harmful depending on the substances used to make the repellents.
    https://www.healthshots.com/preventive-care/self-care/why-burning-mosquito-coil-is-dangerous-for-your-health/