Estonia Has Least Polluted Urban Air in the World27 September
2011 Levels of fine airborne particles in Estonia's urban areas
are the lowest in the world, a comparative table published by
the World Health Organization (WHO) on 26 September reveals. The
Indian Ocean island nation Mauritius ranked second while Canada
landed in third place, according to the WHO data. The report
looked at two different particle sizes: those with a diameter
less than 2.5 micrometers (PM2.5) and those smaller than 10
micrometers (PM10). In Estonia, PM2.5 was registered at 5.4
micrograms per cubic meter of air, while PM10 was at 11
micrograms per cubic meter of air. The highest concentration of
particles was registered in Mongolia, where PM2.5 peaked at 63
and PM10 at 279 micrograms per cubic meter of air. According to
WHO, each year over two million people around the world die due
to the inhalation of fine particulate matter. The WHO ranking
list contained results of urban outdoor air pollution monitoring
from almost 1 100 cities w