Research Article
[Retracted] Corporate Environmental Governance Performance Evaluation and Index System Construction under the Mobile Communication System
Table 3
Quality and ecological protection indicators.
| First level indicator | Secondary indicators | Three-level indicators |
| Quality | Air | Annual average concentration of sulfur dioxide | Annual average concentration of nitrogen dioxide | Proportion of days with air quality reaching level 2 or higher | Water | Urban water penetration rate | Rural water reform rate of return | Toxic chemicals | Discharge equivalent of harmful substances in industrial wastewater | Safe disposal rate of industrial hazardous waste | Waste management and sanitation | Industrial solid waste discharge intensity | Harmless treatment rate of urban domestic garbage | Wastewater discharge intensity |
| Ecological protection | Biodiversity | The proportion of nature reserves in the area of jurisdiction | Vegetation cover index | Biological abundance index | Urban greening | Park green area per capita | Climate change | CO2 emissions per unit of GDP |
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