Research Article

Forecasting CO2 Emissions in China’s Construction Industry Based on the Weighted Adaboost-ENN Model and Scenario Analysis

Table 1

Definition of the variables.

VariableDefinition

emissions in construction industry in year t ( t);
direct emissions in construction industry in year t ( t);
indirect emissions in construction industry in year t ( t);
total energy consumption of type of energy in year t ( t);
the emission factors of type of energy;
total consumption of the type of building material in year t ( t);
emission factors of type of building material;
total energy consumption in year t ( t);
construction output value in year t ( yuan);
gross domestic product in year t ( yuan);
total population in year t (person);
fixed asset investment ( yuan);
labor input (person);
fixed asset investment of construction industry in year t ( yuan);
labor input of construction industry in year t (person);
carbon dioxide coefficient of type of energy in year t;
energy structure of type of energy in year t;
direct energy intensity in year t;
indirect carbon intensity in year t;
per capita in year t ( yuan/person);
construction fixed asset investment ratio in year t;
construction labor input ratio in year t;
energy structure of coal in year t;
energy structure of coke in year t;
energy structure of gasoline in year t;
energy structure of kerosene in year t;
energy structure of diesel in year t;
energy structure of fuel oil in year t;
energy structure of natural gas in year t;
energy structure of electricity in year t.

Note: indicates energy structure.