What make a structure, like a bridge or building, environmentally friendly? One measure has been how much CO2 or other harmful emissions were involved in the materials used, the equipment needed for the construction, and the procedures on the jobsite. The cumulative of these factors is the “carbon footprint” of the structure.
We often discuss the CO2 release involved in concrete production or steel foundries or electricity generation, and there are scientific research papers that quantify those factors. Academic research has, indeed, focused on making construction materials more environmentally friendly by cutting back on the carbon released into the atmosphere
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