From an air filtration point of view, there are two basic types of air contaminants, particles and vapor.
If you don’t know which type you’re dealing with, you can’t filter it out of the air.
Using #FilSci, we sometimes focus on terms that have significance in the discipline of air filtration.
We start with haze, which is not a simple substance.
In order to define it, we have to also define particulate and vapor.
Filtration in Industrial Hygiene, Brown, Richard D., AIHA, Sep/Oct 2001; 62, 5.