上半年全国蓝天比例减少 京津冀地区污染加剧

Chinese cities have reported fewer days with good air in the first half (H1) of 2017, with the Beijing-Tianjin-Hebei area suffering from higher density of key pollutants, official data showed.

官方数据显示，今年上半年，全国城市空气良好天数减少，京津冀区域的主要污染物浓度上升。

The 338 cities monitored by the Ministry of Environmental Protection (MEP) enjoyed good or excellent air quality on 74.1% of the days in H1, down 2.6 percentage points year-on-year, according to Liu Zhiquan, head of the environmental monitoring department at the MEP.

环保部环境监测司司长刘志全称，上半年，环保部监测的338个城市空气优良天数比例为74.1%，同比下降2.6个百分点。

During the same period, the density of hazardous fine particle matter PM2.5 remained unchanged from a year ago while the density of PM 10 was down 2.2%.

同期，有害细颗粒物PM2.5浓度同比持平，PM10浓度则同比下降了2.2%。

Air quality in 13 cities in the Beijing-Tianjin-Hebei area was rated good or excellent on 50.7% of the days in H1, down 7.1 percentage points year-on-year.

上半年，京津冀区域13个城市的空气优良天数比例为50.7%，同比下降7.1个百分点。

The density of PM2.5 and PM10 in these regions also climbed 14.3 percent and 13.2 percent, respectively, indicating worsened air quality.

这些地区的PM2.5和PM10的浓度也分别上升了14.3%和13.2%，表明空气质量有所恶化。

Of the country's 74 major cities, Haikou in Hainan had the best air quality while Handan in Hebei was the most polluted, MEP data showed.

环保部数据显示，74个主要城市中，空气质量最好的是海南海口，污染最严重的是河北邯郸。