The World Health Organization recommends that levels not exceed 20 micrograms per cubic metre in a 24 hour period, and states: “There is a close, quantitative relationship between exposure to high concentrations of small particulates (PM10 and PM2.5) and increased mortality or morbidity, both daily and over time.”
fredag 16. april 2021
Beijing hit by third sandstorm in five weeks
The third major sandstorm in five weeks turned Beijing’s skies sepia on Thursday, and sent air quality plummeting in the Chinese capital. The storms, caused by winds from drought-hit Mongolia and north-western China, sent levels of the pollutant PM10, which can penetrate the lung, to 999 micrograms per cubic metre – a level almost double the “hazardous” stage indicated by the Beijing air pollution real time quality index.
The World Health Organization recommends that levels not exceed 20 micrograms per cubic metre in a 24 hour period, and states: “There is a close, quantitative relationship between exposure to high concentrations of small particulates (PM10 and PM2.5) and increased mortality or morbidity, both daily and over time.”
The World Health Organization recommends that levels not exceed 20 micrograms per cubic metre in a 24 hour period, and states: “There is a close, quantitative relationship between exposure to high concentrations of small particulates (PM10 and PM2.5) and increased mortality or morbidity, both daily and over time.”
