MSD will be participating in the St. Louis Green Business Challenge Expo. The expo is Wednesday, September 12, from 9:30 a.m. to 11:30 a.m. at the Sheet Metal Workers Local Union 36 headquarters. The address is 2319 Chouteau Avenue, 63103. The expo is free. A full list of exhibitors can be found here. If you would like to attend the St. Louis Green Business Challenge Expo, click here to register.