Shanghai’s Environmental Protection Bureau has launched a new air-quality measure giving hourly updates on more kinds of pollution in the city, Shanghai Daily reported Tuesday. The index will include hourly updates for all major pollutants, including PM10 and hazardous PM2.5 particles, though the original air quality index (AQI) will still be used for forecasting and as the yardstick for pollution alarms, the report said. The AQI is based on the levels of six pollutants, but only four are updated hourly, with the PM2.5 and PM10 readings given as an average over the previous 24 hours, the report said. Fu Qingyan, chief engineer at the Shanghai Environmental Monitoring Center, said the new index is a better gauge than the AQI when conditions change quickly.
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