Table 3.

The results of sensitivity analysis.

Variables	+10%	−10%	Variables	+10%	−10%
Birth rate of the rural population	11.56	11.05	Birth rate of the urban population	3.81	3.89
Determinants of rural family planning	11.56	11.05	Determinants of urban family planning	3.81	3.89
Education factor	23.80	6.05	Growth rate of the labor force of the primary industry	8.34	8.07
Growth rate of the labor force of the secondary industry	0.35	0.36	Growth rate of the labor force of the tertiary industry	0.63	0.67
Growth rate of coal production	1.42	1.38	Growth rate of petroleum production	0.11	0.11
Growth rate of natural gas production	0.34	0.33	Growth rate of non-fossil energy	0.41	0.49
The SO2 removal rate of per unit coal	0.45	0.41	Proportion of R&D investment	0.01	0.01