2nd UMN-CAS Bilateral Seminar on PM2.5 science, health effects and control technologies, October 7-8, 2015 at 3M Innovation Center, Maplewood, MN, USA

The First UMN-CAS Bilateral Seminar was successfully held in Xi＇an, China, May 27-28,2014. A summary of the 1 st Bilateral Seminar was published in Particuology 16 （2014）, 227-229. The Second UMN-CAS Bilateral Seminar was held at 3M Innovation Center, St. Paul, Minnesota, October 7-8, 2015.