[Retracted] Regional Variation in the Carbon Dioxide Emission Efficiency of Construction Industry in China: Based on the Three-Stage DEA Model

Table 1

Conversion coefficient from physical unit to coal equivalent.

Energy	Coal	Coke	Crude oil	Gasoline	Kerosene	Diesel	Fuel oil	Natural gas	Electricity
Conversion coefficient	0.686	0.971	1.429	1.471	1.471	1.457	1.429	13.3	1.229
Unit	tce/t	tce/t	tce/t	tce/t	tce/t	tce/t	tce/t	tce/10^4m^3	tce/10^4 kW h