DEFINITION & TERMINOLOGY. drug use. related: chemical substance use. substance use. not to be confused with: drug misuse. drug abuse. drug use is the proper administration of any chemical substance such that it produces an effect with a desirable outcome.
Most likely itâs the smell of mold and/or mildew. Thatâs bad news because your AC is most likely distributing mold and/or mildew spores throughout your home. Both harmful to your health, especially if you have allergy issues. Letâs go over the sources of the mold/mildew and what you can do to get rid of it.
1 Condensation (moisture) forms on the cold coil when the warm air flows over it.  All thatâs needed is food (dirt/dust). Unfortunately, dust/dirt usually sticks to the coil because of the condensation, giving mold the food it needs (this is less likely to happen if you regularly change your air filter).