In 2021, the national ecological quality index was 59.77, and the comprehensive evaluation of ecological quality was ＂Class II＂.

CCTV News:The Ministry of Ecology and Environment recently released the national ecological quality index for the first time, and comprehensively evaluated the ecological quality in 2021. The results show that the value of "National Ecological Quality Index" is 59.77, and the comprehensive evaluation of ecological quality is "Class II". What does this evaluation represent? What reference does this index have for improving the ecological environment in various places? Come and see the reporter’s observation.

It is understood that in 2021, the national ecological quality index value is 59.77, and the comprehensive evaluation of ecological quality is "Class II", which shows that China is rich in biodiversity, with a high proportion of natural ecosystem coverage, a complete ecological structure and perfect functions. Among them, the county area with "Grade I" ecological quality accounts for 27.7% of the national land area, mainly distributed in Daxing ‘anling, Changbai Mountain and southeastern Qinghai-Tibet Plateau in the northeast; The second-class county area accounts for 32.1%, mainly distributed in Sanjiang Plain, Inner Mongolia Plateau, Loess Plateau, Kunlun Mountain, Sichuan Basin, Pearl River Delta and the middle and lower reaches of the Yangtze River. The county area of "Class I" and "Class II" accounts for about 60% of the national territory.

Dong Mingli said that carrying out ecological quality assessment is a "comprehensive physical examination" for the overall situation of the ecosystem. Mainly from four aspects, namely "ecological pattern", "ecological function", "biodiversity" and "ecological stress".

"Ecological pattern" reflects the type, quantity, spatial distribution and configuration of ecological land such as woodland, grassland and wetland in regional ecosystem, which is similar to the surgical examination of human height and weight. "Ecological function" reflects the stability and adjustment ability of the ecosystem, just like the medical examination of general functional indexes such as "liver, kidney, spleen and stomach" in physical examination; "Biodiversity" reflects the biodiversity at the regional species level and the vitality of the ecosystem, which is similar to the examination of core functional indicators such as the human heart. The "ecological stress" reflects the interference and pressure on the ecosystem, similar to the health hazards of some people "smoking, drinking and staying up late".