The top building material categories that account for most embodied carbon in home construction include concrete, rebar, insulation, glazing, and finishes. There are proven low-embodied-carbon solutions that can be broken down into three main categories: whole-building design, one-for-one material substitution, and specification. In general, whole-building design solutions can drive the greatest embodied carbon savings along with following low-embodied-carbon best practices throughout the building design and construction process.