State | Environment index growth rate | Urbanization index growth rate | Decoupling index (DI) | |
---|---|---|---|---|
Decoupling | Recessive decoupling | - | - | DI>1.2 |
Strong decoupling | - | + | DI<0 | |
Weak decoupling | + | + | 0<DI<0.8 | |
Connection | Expansive coupling | + | + | 0.8<DI<1.2 |
Recessive coupling | - | - | 0.8<DI<1.2 | |
Negative decoupling | Expansive negative decoupling | + | + | DI>1.2 |
Strong negative decoupling | + | - | DI<0 | |
Weak negative decoupling | - | - | 0<DI<0.8 |