  This paper aims to investigate the factors that can mitigate carbon-dioxide
(CO2) intensity and further assess CMRBS in China based on a household scale
via decomposition analysis. Here we show that: Three types of housing economic
indicators and the final emission factor significantly contributed to the
decrease in CO2 intensity in the residential building sector. In addition, the
CMRBS from 2001-2016 was 1816.99 MtCO2, and the average mitigation intensity
during this period was 266.12 kgCO2/household/year. Furthermore, the
energy-conservation and emission-mitigation strategy caused CMRBS to
effectively increase and is the key to promoting a more significant emission
mitigation in the future. Overall, this paper covers the CMRBS assessment gap
in China, and the proposed assessment model can be regarded as a reference for
other countries and cities for measuring the retrospective CO2 mitigation
effect in residential buildings.
