Beijing in first smog alert of year

Beijing is blanketed with thick smog on Tuesday, a sharp contrast to the blue skies during the APEC meetings in the capital in November. ZOU HONG/CHINA DAILY

Hazy days set to last until Friday

Beijing issued its first smog alert of 2015 on Tuesday, with the PM2.5 index passing the 200 level.

The alert will probably remain in force until Friday, the municipal environmental authority said.

Based on the official daily air quality forecast, the capital issued a yellow alert and adopted emergency measures to rein in emissions on Sunday, one day before the smog descended. A yellow alert is the third-highest level among four grades.

Shanghai, which emerged from three days of smog on Monday, will experience another round of air pollution on Wednesday, according to the regional air quality forecast center.

The air quality forecast, which is as important as the daily weather forecast, has begun to attract more attention, especially from people living in large cities like Beijing and Shanghai, which witness frequent air pollution.

By the end of 2014, cities in three major industrial zones - the Beijing-Tianjin-Hebei area, the Yangtze River Delta and Pearl River Delta - were required to provide a daily air quality forecast, according to the Ministry of Environmental Protection.