Compared with the previous year, the percentage of the cities in the SO2 Pollution Control Zone attaining the standards increased a little bit and the percentage of the cities worse than Grade III reduced by 4.3%.

• 与上年相比，二氧化硫污染控制区二氧化硫达标城市比例略有增加，劣于三级城市比例下降4.；3个百分点。