Aerosol

A dispersion (suspension) of particles or droplets of liquid in air or gas.

FAQ
An aerosol is a hold-up of particles or droplets of liquid in air or gas. Aerosols are capable of being anthropogenic or natural.
Particulate matter can be defined as the total of liquid and solid particles that are suspended in the air, many of which are dangerous to the respiratory system. Containing pollen, dust, smoke and soot; these particles can be more than hazardous.
Particulate matter (PM) can affect your health. PM comprises of microscopically tiny solid particles suspended in the air. Extremely small particles are able to enter the respiratory system, making them more dangerous to breathe.