Cemex has revealed significant progress in key indicators related to sustainable construction. “We are proud to have reached an alternative fuels substitution rate of close to 25% in our cement operations in 2011, on track to achieve a rate of 35% by 2015,” said Lorenzo Zambrano, chief executive of Cemex. In 2011, Cemex’s rate of alternative-fuel use rose to 24.7% of total fuel mix, a sizable improvement from its rate of 20.3% in 2010. In addition, the company achieved a 22.7% reduction on CO2 net emissions