Preface to the Special Issue on the Program of “Carbon Budget and Relevant Issues”—A Strategic Scientific Pioneering Program of the Chinese Academy of Sciences

<正>Global warming has been one of the biggest issues faced by the world in recent decades.It is closely related to anthropogenic emissions of greenhouse gases(GHGs)—mainly CO_2,CH_4 and N_2O—and the effects of reducing emissions and increasing the carbon fixation capability.China,as a large country with rapid economic and social development,has a major