The National Assn. of Manufacturers (NAM) and the Manufacturing Institute will hold a Capitol Hill exhibit Apr. 13 on the ways manufacturers are reducing waste emissions, recycling materials, and improving the environment. The event will feature displays by the Aluminum Assn., the American Forest and Paper Assn., Automotive Parts Rebuilder Assn., Edison Electric Institute, Flexible Packaging Assn., Glass Packaging Institute, International Sign Assn., Motor and Equipment Manufacturers Assn., National Marine Manufacturers Assn., and National Mining Assn. The event will be from 11:30 a.m. to 5 p.m. in the Rayburn Foyer of the Rayburn House Office Building.