Energy efficiency in the cement industry is at an all-time high, according to PCA's latest U.S. Labor-Energy Input Survey.

• Here are the highlights:

The amount of energy required to produce one ton of cement decreased 1.1% in 2014 from the previous year.

• The use of alternative fuels at cement plants was also on the rise in 2014, with 75% of all U.S. plants now incorporating alternative fuels into their energy strategy.
• The rise of alternative fuels, coupled with improvements in process technology and equipment, have reduced energy consumption at cement plants by 40% since 1975.
• Process and product refinements to further reduce the environmental footprint of cement include a greater use of limestone in cement that reduces energy use, raw materials, and carbon dioxide emissions.
• The U.S. cement industry labor productivity also increased in 2014 with an industry average of 3.17 metric tons of cement produced per employee hour – a 2.6% jump in labor productivity from year-ago levels.