Reuters: Beijing is to raise the thresholds for issuing its highest air pollution warnings, the state news agency Xinhua reported on Sunday, two months after acrid smog triggered the city's first ever "red alerts".
In future, the highest alert will only be issued when the daily average air quality index (AQI) is forecast to exceed 500 for a day, 300 for two days in a row or 200 for four days, Xinhua reported, citing Beijing's environmental protection bureau.
At present, a red alert is issued when the...