Laser parricle counter check air getting well or not

Air pollution index has increased in recent years. Relevant departments have taken measures to protect.
But what else we can do to protect the air we are breathing everyday?
Laser particle counter help you know how much fine particulate matters in the air.
Then we can consider to use the air purifier to clean our home or put some plants.
Particle counter can show you the level of the air quality of today is good or bad depends on WHO request.