What will be the concept once the PM2.5 over 1000

Air particle counter now very hot selling because it can help to solve the pollution questions.
Fine particulate matter on human health hazards to be more, because the smaller the diameter, the deeper into the respiratory tract.
Particles of 10 m diameter are usually deposited in the upper respiratory tract,
and 2 m below the depth of the upper respiratory tract and alveolar.
Use the laser particle counter can easy check out the result of the PM2.5. and then know how to solve it.