A popular cement industry saying is Concrete is the second used substance by people after water. It also accounts for 5% of the green house gas releases.
A company that is zero waste and focusing on the environmental angle is Taiheiyo Cement. It seems in addition to Cement, other materials can be used in Concrete. This offers a lot of potential for disposing of waste items. For example ash from trash incinerators. Good paper to read - Waste Management Technologies in Japanese Cement Industry. New term, Ecofactuaring
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