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Journal of Environmental and Public Health
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2022
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Article
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Tab 5
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Research Article
Analysis of the Key Factors of Ecological Environment Protection in the National Economic Sustainable Development Goals
Table 5
The grading standard of urban ecological environment sustainability.
Grade
Exponential quantity
Qualitative evaluation
One
>0.8
Fine
Two
0.6–0.8
Preferably
Three
0.4–0.6
Same as
Four
<0.4
Very bad