Bull Environ Contam Toxicol. 2025 Nov 30;115(6):77. doi: 10.1007/s00128-025-04152-4.
ABSTRACT
China faces escalating ozone pollution challenges, with O3 becoming the primary pollutant in summer since 2013 and exhibiting deteriorating compliance rates (Grade I attainment plummeted from 6.9 to 0.3% during 2015-2023). Critical hotspots include the Beijing-Tianjin-Hebei region (exceeding standards by 20 µg/m3), driven by inadequate coordinated control of VOC and NOx. Analysis of the ABaCAS-EI v2.0 dataset (2005-2021) reveals divergent precursor trends: VOC emissions shifted from residential to industrial dominance, with industrial solvents (PRSO) surging 389% during 2005-2013 and comprising 61% of national totals by 2021. Spatially, eastern provinces (e.g., Guangdong) showed transport-industrial emission profiles (TRON: 28%; PRSO: 32%), while northern regions achieved significant NOx reductions through industrial restructuring, with Hebei’s emissions falling 46% from peak levels. Conversely, NOx emissions peaked earlier (2011), but transportation’s share grew to 42% by 2021 (TRON: 31%). Regional disparities persist-coastal areas leveraged advanced controls, whereas western provinces struggled with expanding pollution bases. These findings underscore the imperative for spatially-explicit strategies addressing sector-region heterogeneities to mitigate ozone’s health/ecological impacts.
PMID:41320696 | DOI:10.1007/s00128-025-04152-4
