First of all, we need to know more the harm
of
PM2.5?
Each year about 2.1 million people died of
PM2.5 particles concentration increased
It is understood that in 2012 the
United Nations environment programme (unep),
the global environment outlook 5 points out
that there are 700000 people die each year
from respiratory disease caused by ozone,
nearly 2 million premature deaths associated with
particulate
matter pollution.
The proceedings of the national academy of sciences
(PNAS) also published research report,
said in a report, human life expectancy
because air pollution is likely to have shortened the five and a half
years.
before you order
particle counter need to know
above this information.