New York Times: Bloomberg A Cemex cement plant in Monterrey, Mexico. The company is angling to reduce its carbon footprint at plants around the world. With cement production accounting for as much as 5 percent of global emissions of carbon dioxide — and the potential for expanded carbon caps looming — Cemex, one of the world’s largest producers of building materials, is angling to bring down its carbon dioxide emissions and perhaps wind up with some credits it can sell. “We are preparing …