Inventory-Based Co-Control Screening of Air Pollutants and Greenhouse Gases in a Typical Yangtze River Delta City

Abstract

While integrating greenhouse gas and air pollutant (AP) mitigation is essential for urban sustainability and public health, municipal-level prioritisation of co-control targets remains hindered by fragmented microdata and decoupled emission inventories. Using Jiaxing—a typical industrialised city in the Yangtze River Delta—as a case study, this work develops a two-dimensional H/G screening framework based on a harmonised 2024 integrated emission inventory and enterprise-level environmental statistics. By converting 54 non-zero source categories into an aggregated matrix, the framework evaluates AP contributions (H-score, averaging PM2.5, NOx, SO2, VOCs, and NH3) against 100-year global warming potential (GWP100)-weighted CO2-equivalent emissions (G-score). The 70th-percentile screening separates coupled co-control candidates (e.g., combined heat and power, thermal power generation, and motor vehicles) from decoupled, pollutant-specific priorities (e.g., industrial solvent use for VOCs, and paved roads for particulate matter (PM)). Spatial mismatch analysis also contrasted VOC-dominant and CO2-dominant reporting units, cautioning against a single citywide priority list. Application of an observed 75th-percentile abatement benchmark to reporting industrial enterprises identified a benchmark-implied VOC reduction of 7941 tonnes in 2024. This inventory-based screening framework provides a practical, reproducible methodology to separate integrated-review sources from single-dimension priorities and to identify priority sources for subsequent exposure and health co-benefit assessment.