Criterion layer	Index layer	Influence direction
Low carbon environment	Investment in environmental pollution control as a percentage of GDP	+
	Forest cover rate	+
	Research and experimental development expenditure as a percentage of GDP	+
	Research and experimental development expenditure growth rate	+
Low-carbon economy	GDP growth rate per capita	+
Low-carbon economy	The added value of the tertiary industry as a proportion of GDP	+
Low carbon energy	Energy consumption per unit GDP	−
	Reduction rate of energy consumption per unit GDP	+
	Proportion of non-fossil energy in primary energy consumption	+
	Non-fossil energy consumption growth rate	+
CO₂ benefits	Carbon dioxide emissions per unit of energy	−
	Carbon dioxide emissions per unit of GDP	+
	Reduction rate of carbon dioxide emissions per unit of GDP	−