By developing a filtering framework
and a sector-level multi-regional
input–output structural decomposition model, this study identifies
key common emission sources, motivation sources, and inter-provincial
emission flows of both GHGs and air pollutants and reveals the key
driving forces of changes in different emissions from 2012 to 2017.
Results show that key common emission sources are electricity sector,
non-metallic mineral products, and smelting and processing of metals
in Shandong and Hebei. However, key common motivation sources are
the construction sectors in Guangdong, Henan, Jiangsu, Zhejiang, and
Shandong. The key inflow regions include Guangdong and Zhejiang and
key outflow regions include Jiangsu and Hebei. The emission reductions
are attributed to the emission intensity effect of the construction
sector; contrastingly, the emission increase is from the investment
scale of the construction sector. Here, Jiangsu could be a key target
for future emission reduction because of its high absolute emissions
and low past reduction. The scale of investment in construction might
be a significant factor in reducing emissions in Shandong and Guangdong.
Henan and Zhejiang could concentrate on sound new building planning
and resource recycling.