Carbon Dioxide Emission Measurement and Its Spatiotemporal Evolution of Tourism Industry in Heilongjiang Province, China

Table 2

Tapio carbon emission decoupling relationship index.

Type	Index	ΔE	ΔI	t	Implication
Decoupling	Strong decoupling	<0	>0	<0	CO2 emissions reduced and income increased
	Recession decoupling	<0	<0	>1.2	The reduction rate of CO2 emissions is faster than the reduction rate of income
	Weak decoupling	>0	>0	0 < t < 0.8	The increase in CO2 emissions is slower than the increase in income
Connection	Critical growth	>0	>0	0.8 < t < 1.2	CO2 emissions are growing at the same rate as income
	Critical decline	<0	<0	0.8 < t < 1.2	CO2 emissions are declining at the same rate as income
Negative decoupling	Weak negative decoupling	<0	<0	0 < t < 0.8	The reduction rate of CO2 emissions is slower than the reduction rate of income
	Expansive decoupling	>0	>0	>1.2	The increase in CO2 emissions is faster than the increase in income
	Strong negative decoupling	>0	<0	<0	CO2 emissions increased and income reduced