Figure 7.
The results of early-warning assessments of regional sustainability in China. (a) National assessment for China conducted in 2014. (b) Spatial distribution of key constraint factors within overloaded and critical overload zones. (c) Regional sustainability early-warning for the YREB in 2017 based on the 2014 methodology. (d) Regional sustainability early-warning for the YREB in 2017 based on the updated methodology incorporating a more comprehensive set of pollution indicators. Data are derived from Refs. [20,79].
