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Does Water Vapor from Natural Gas Combustion Worsen Air Quality? Reassessing the Impact of Coal-to-Gas Switching on Winter Haze in Northern China
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DOI:10.1016/j.atmosenv.2026.122205.png)
Abstract
En 中文
• Challenges that water vapor from fossil fuels necessarily worsens winter PM2.5. • Coal-to-gas policy increased humidity but reduced PM2.5 by 10% during severe episodes. • Mechanism: humidity promotes aerosol formation and dispersion; dispersion dominates. • Policy benefits go beyond emission cuts to improving meteorological diffusion. • Uses PSM-DID and WRF-Chem to attribute observed changes to the policy.
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