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PM2.
5 is an important air pollutant, and it is also an important environmental factor that causes death and disability.
Every year, about 4 million deaths worldwide are related to high PM2.
5 levels
.
The WHO guidelines believe that the annual average PM2.
5 level is above 10 μg/m3, which is related to the increased risk of death among residents
Researchers have recently examined the relationship between PM2.
This study is based on Canadian census data in 1996, 2001 and 2006.
663,100 participants aged 25-89 had lived in the same area during the five years before the census and moved in the following five years
The study found that when relocating from high PM2.
5 areas to middle or low PM2.
5 level areas, the residents' annual PM2.
5 exposure dropped from 10.
6μg/m3 to 7.
4 and 5.
0μg/m3, respectively
.
On the contrary, relocating from a low PM2.
5 area to a medium or high PM2.
Five years after moving, the mortality rate of residents in the PM2.
PM2.
PM2.
In Canada, changes in PM2.
Original source:
Hong Chen et al.
Changes in exposure to ambient fine particulate matter after relocating and long term survival in Canada: quasi-experimental study.
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