As the world’s cities expand at faster and faster speeds, so does its use of cement. One oft-quoted statistic shows that China alone used as much cement in the last three years as the US used in the last 100. Just one problem: Cement is responsible for pushing a hell of a lot of carbon dioxide into the world.
via Gizmodo http://ift.tt/1CQ6u5x http://ift.tt/1b0NoCi
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