Energy / CO₂ intensities based on 2011 input - Output table and evaluation of embodied impacts of buildings

Energy consumption and CO2 emissions are collectively known as the embodied impact. The current study calculated energy intensity and CO2 emission intensity based on the 2011 Input-Output (I-O) Tables for Japan, and it compiled those values into an intensity database. This study analyzed the EG of the Japanese building and construction sectors, and the following findings were obtained: 1) Research on EE and EG (EEG) has been conducted by the IEA EBC Annex 57 project. 2) EG by the construction sector accounted for 14.2% of total CO2 emissions in Japan. EG decreased every year from 20.3% in 1995.