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| Variable | Symbol | Unit (of measure) | Coefficient | t | P>|t| |
|---|---|---|---|---|---|
| Green area | Z1 | Square kilometer | 0.702*** | 4.80 | 0.000 |
| Carbon emissions from human respiration | Z2 | tons | -0.806*** | -4.11 | 0.000 |
| Domestic garbage removal volume | Z3 | tons | -1.302*** | -5.53 | 0.000 |
| General industrial solid waste emissions | Z4 | tons | 0.300*** | 6.19 | 0.000 |
Note:
*** represents a significance level of 1%, while
** represents a significance level of 5%.
