LONG BEACH, Calif.--(BUSINESS WIRE)--When it comes to curtailing air pollution, America stands alone as an industrial nation with clean air. According to a recently released Manufacturers Alliance for Productivity and Innovation (MAPI) Foundation study, manufacturers in the United States spent $5.3 billion in 2014 – more than the other eight countries in the study combined – in reducing air pollution. Also, in terms of greenhouse gas abatement, MAPI reports that the U.S. spends $1.2 billion ann