supported jointly by the National Natural Science Foundation of China (Grant No.40602031);the Fundamental Research Funds for the Central Universities (Grant No.CUGL090213);the Natural Science Foundation of Hubei Province (Grant No.2011045003)
The increase of CO2 in atmosphere is a main factor leading to "greenhouse effect", which causes more and more serious global environmental problems. The reduction of CO2 is a challenge for the survival of human beings...