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(jù)中廣網(wǎng)報(bào)道，28日，中國(guó)氣象局預(yù)報(bào)與網(wǎng)絡(luò)司針對(duì)霧霾預(yù)警信號(hào)標(biāo)準(zhǔn)進(jìn)行了修訂，首次將PM2.5作為發(fā)布預(yù)警的重要指標(biāo)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(yù)警分為黃色、橙色、紅色三級(jí)。根據(jù)環(huán)境保護(hù)的監(jiān)測(cè)，29日，包括京津冀在內(nèi)的多個(gè)省份和地區(qū)遭受霧霾天，全國(guó)霧霾面積達(dá)130萬(wàn)平方公里。這也是北京本月遭受的第4輪霧霾天。

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