4Susan Sunila Sharma.Determinants of carbon dioxide emissions: Empirical evidence from 69 countries[J].Applied Energy, 2011, 1,(88): 376-382.
5Hirofumi Tsuji, Hiromi Shirai, Hiromitsu Matsuda, et al. Emission characteristics of NOx and unburned carbon in fly ash on high-ash coal combustion [J].Fuel, 2011, 2, (90):850-853.
6Shu Kee Lam, Erda Lin, Rob Norton, et al. The effect of increased atmospheric carbon dioxide concentration on emissions of nitrous oxide, carbon dioxide and methane from a wheat field in a semi-arid environment in northern China[J].Soil Biology and Biochemistry, 201 l, 2,(43):458--461.
