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 indicatorSecondary indicatorsThree-level indicators

QualityAirAnnual average concentration of sulfur dioxide
Annual average concentration of nitrogen dioxide
Proportion of days with air quality reaching level 2 or higher
WaterUrban water penetration rate
Rural water reform rate of return
Toxic chemicalsDischarge equivalent of harmful substances in industrial wastewater
Safe disposal rate of industrial hazardous waste
Waste management and sanitationIndustrial solid waste discharge intensity
Harmless treatment rate of urban domestic garbage
Wastewater discharge intensity

Ecological protectionBiodiversityThe proportion of nature reserves in the area of jurisdiction
Vegetation cover index
Biological abundance index
Urban greeningPark green area per capita
Climate changeCO2 emissions per unit of GDP