For the same change in PM2
.5, the corresponding increases in daily mortality were 0.68, 0.55, and 0.74 percent.
'Concentration of all three parameters namely NO2, SO2 and PM2
.5 are below the permissible limits of NEQS.
.5 is finer than a strand of hair at 2.5 microns in diameter and can be made up of hundreds of different chemicals.
However, concentrations of PM2
.5 during the day and evening time as recorded slightly high, whereas the overall ambient air quality of the federal capital was healthier today.
The program focuses on 102 polluted Indian cities and aims to reduce PM2
.5 levels by 20-30 per cent over the next five years.
Although the study found that much of Taichung City did not exceed PM2
.5 and carcinogen standards, the following seven districts had high concentrations of carcinogens: Longjing, Situn, Dadu, Daya, Cingshuei, Houli, and Wuci.
The Philippines ranked 48th on the list with an average of 14.6 micro/msup3 of PM2
.5, classified as "moderate.
The ministry does not follow an international standard for defining air quality but lists a PM2
.5 reading of 50 as the level at which concerns arise.
The World Health Organisation sets a guideline limit of 10 ug/m3, the amount of particles by cubic metre of air, for annual levels of PM2
.5, which include fine particles of dust, dirt, soot, and smoke, often due to road vehicles.
WHO safe limits of 10 micrograms of PM2
.5 per cubic metre were exceeded for eight-and-half hours out of the 24.
Tiny particulates known as PM2
.5s are given off when meat, bread, pastry and vegetables are roasted and burned.