PM2.5首成霧霾預警標準

PM2.5 is smog indicator??

The average concentration of PM2.5 has for the first time become one of the indicators for smog alerts, according to a new regulation on smog alert that has been modified by the weather forecast and network office under the China Meteorological Administration.

據中廣網報道，28日，中國氣象局預報與網絡司針對霧霾預警信號標準進行了修訂，首次將PM2.5作為發布預警的重要指標之一。

The alert is classified in 3 levels – Yellow, Orange and Red – in accordance with the gravity of the smog. The smoggy weather that has choked many regions including Beijing, Tianjin and Hebei affected a total area of 1.3m sq km, according to Tuesday's monitoring by the Ministry of Environmental Protection. It was the 4th round of heavy smog to hit Beijing in 4 weeks.

此次修訂將霾預警分為黃色、橙色、紅色三級。根據環境保護的監測，29日，包括京津冀在內的多個省份和地區遭受霧霾天，全國霧霾面積達130萬平方公里。這也是北京本月遭受的第4輪霧霾天。

訂閱信息：中國移動用戶發送短信CD到10658000，5元/月