Reduction potential of ammonia emissions and impact on PM in a megacity of central China.

Ammonia control has attracted attention due to the possibility for fine particles (PM) mitigation. Based on past decade ammonia emissions assessments and future predictions, this study seasonally evaluated the ammonia emissions reduction potential in 2025 and 2030 in Wuhan, a Central China megacity, according to the short-term and long-term predictable policies. Furthermore, combined with the reduction potential, PM components observation and thermodynamic model, the effectiveness of implementing ammonia emission control to reduce PM by 2025 and 2030 was explored seasonally.