China's environment further improved last year according to an official report on environmental conditions in 2021.

国务院关于2021年度环境状况和环境保护目标完成情况的报告显示，2021年，全国生态环境质量明显改善。

Last year, the percentage of days with good air quality was 87.

5 percent in cities at and above the prefectural-level, up 0.

5 percentage points year-on-year according to the report, which was submitted on Monday to the National People's Congress Standing Committee for review.

4月18日，十三届全国人大常委会第三十四次会议听取国务院关于2021年度环境状况和环境保护目标完成情况的报告。

报告指出，2021年，全国空气质量持续向好。

地级及以上城市空气质量优良天数比率为87.

5%，同比上升0.

5个百分点。

The average concentration of PM2.

5 hazardous particles was 30 micrograms per cubic meter, down 9.

1 percent year-on-year.

细颗粒物(PM2.

5)平均浓度为30微克/立方米，同比下降9.

1%。

The proportion of surface water at or above Grade III in the country's five-tier water quality system increased 1.

5 percentage points year-on-year to 84.

9 percent in 2021, and the proportion of surface water below Grade V, the lowest level, stood at 1.

2 percent.

2021年，我国地表水Ⅰ—Ⅲ类水质断面比例为84.

9%，与2020年相比上升1.

5个百分点；劣Ⅴ类水质断面比例为1.

2%。

【2021年，地级及以上城市空气质量优良天数比率为87.5%查看网站：[db:时间]】