Impact of NOx and NH3 Emission Reduction on Particulate Matter across Po Valley: A LIFE-IP-PREPAIR Study

Giorgio Veratti^1,2,* , Michele Stortini², Roberta Amorati² , Lidia Bressan² , Giulia Giovannini², Stefano Bande³ , Francesca Bissardella³, Stefania Ghigo³, Elisabetta Angelino⁴, Loris Colombo⁴ , Giuseppe Fossati⁴, Giulia Malvestiti⁴, Alessandro Marongiu⁴, Alberto Dalla Fontana⁵, Barbara Intini⁵ and Silvia Pillon⁵

1 Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, 41125 Modena, Italy
2 ARPAE Emilia-Romagna, Regional Environmental Agency of Emilia-Romagna, 40122 Bologna, Italy; mstortini@arpae.it (M.S.); ramorati@arpae.it (R.A.); lbressan@arpae.it (L.B.)
3 ARPA Piemonte, Regional Environmental Agency of Piemonte, 10135 Torino, Italy; stefano.bande@arpa.piemonte.it (S.B.); franbiss@arpa.piemonte.it (F.B.);  stefghig@arpa.piemonte.it (S.G.)
4 ARPA Lombardia, Regional Environmental Agency of Lombardia, 20162 Milano, Italy; e.angelino@arpalombardia.it (E.A.); lo.colombo@arpalombardia.it (L.C.); g.fossati@arpalombardia.it (G.F.); g.malvestiti@arpalombardia.it (G.M.); a.marongiu@arpalombardia.it (A.M.)
5 ARPA Veneto, Regional Environmental Agency of Veneto, 35121 Padova, Italy; alberto.dallafontana@arpa.veneto.it (A.D.F.); barbara.intini@arpa.veneto.it (B.I.)
* Correspondence: giorgio.veratti@unimore.it