Results showed there were significant associations between PM10
and VOCs with the abnormality of FEV1% among study respondents.
"In the UAE, the high level PM10
comes mostly from dust, and most international studies for PM10
are based on carbon levels, not dust," he added.
The WHO tabulation shows that the most polluted city in the entire world--Number 1,082 on the list--is Ahvaz with 372 microns of PM10
. What's more, Ahvaz has no competition for that ranking.
This means PM10
particles are 10 times smaller than human hair, while PM2.5 particles are a quarter of the size of PM10
These are "significantly lower" (about 24 percent and 14 percent) compared to last year's readings of 149 ug/m3 for PM10
and 131 ug/m3 for PM2.5 for the same station.
Majority of size segregated pollutants including TSP, PM10
and PM2.5 were found with higher values than the United States Environmental Protection agency (US-EPA), National Ambient air Quality Standards (NAAQS), world health organization (WHO) and National Environmental Quality standards for Pakistan (NEQS-Pak) limits for both urban and peri-urban areas, only 4%, 8% and 4% for TSP, PM10
and PM2.5 in urban and TSP (40%) PM10
(60%) and PM2.5 (44%) in peri urban samples were found under prescribed guidelines.
The report said: "The main pollutants of concern are particulate matter (PM10
and PM 2.5) and nitrous oxides (NO2).
A heat map showing the levels of PM10
pollutants in the air in Liverpool
This morningas data shows that the particulate matter (PM10
) concentration in the large cities is above the limit, reports Focus News Agency.A
Summary: Central Pollution Control Board data shows PM10
level in Delhi at 425
Yesterday, almost all places in the NCR saw a drop in the the major pollutants PM2.5 and PM10
-- particles in the air with diameters less than 2.5mm and 10mm respectively.
PM2.5 and PM10
or particles with diameter less than 2.5mm and 10mm, remained the major pollutant throughout the region, due to local factors such as vehicles, industries and dust and stubble burning in Punjab and Haryana.
This should be done through reducing to half PM10
levels by 2030, it said.