“…The results are consistent with Wang et al. 35 On the contrary, in Shanxi, Henan, and Shandong, which have a lot of coal mining and energy-intensive manufacturing, the contribution of synergies in reducing PM 2.5 concentration is relatively limited (e.g., 28.0–33.3% in 2030). Although the synergistic effects generated by carbon reduction in improving air quality will increase among energy-intensive areas during 2030–2050, end-of-pipe technology is likely to remain dominant in reducing PM 2.5 concentration, which contributes to 48.4–57.5% of the PM 2.5 concentration reduction in 2050.…”