What’s the most widely used material in the world apart from water? You may not guess it: cement. Cement is a problem because it accounts for 5 percent of the world’s industrial and energy greenhouse emissions. A new report outlines several ways to reduce the footprint of the cement industry by improving equipment and reducing energy use. The most gains can be made replacing conventional limestone with fly ash, slag or clay.
A sustainable concrete jungle: The road to a zero-carbon cement industry
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