STRUCTURAL ANALYSIS OF CO₂ EMISSION AT A REGIONAL LEVEL BY USING CO₂ INDEPENDENT INDEX

Abstract

 This paper proposes consumption-based CO₂ emission as an indicator of environmental load at a regional level. The followings are analyzed for Shiga prefecture (8 regions) ; 1) estimate production-based CO₂ emissions and consumption-based CO₂ emissions, 2) carbon leakage induced by CO₂ emission reduction, and 3) analyze structure of CO₂ emission by using CO₂ independent index(=production-based CO₂ emission / consumption-based CO₂ emission).
 In Shiga prefecture, CO₂ independent index in 2040 is 1.20. Among regions, the independent indexes are more than 1 in 4 out of 8 regions. It was checked that reductions of production-based CO₂ emissions would not induce carbon leakage by comparing the reduction rate of production-based and consumption-based CO₂ emissions. The contribution of non-metallic minerals sector to the independent index is remarkably large. So, it turns out that there is a possibility that the shrinkage of the sector may cause the large decrease of the independent index.