What does PM2.5 stand for?

PM2.5 stands for "particulate matter less than 2.5 µm in diameter"

How to abbreviate "particulate matter less than 2.5 µm in diameter"?

"particulate matter less than 2.5 µm in diameter" can be abbreviated as PM2.5

What is the meaning of PM2.5 abbreviation?

The meaning of PM2.5 abbreviation is "particulate matter less than 2.5 µm in diameter"

What does PM2.5 mean?

PM2.5 as abbreviation means "particulate matter less than 2.5 µm in diameter"