Carbon 254 Carbon dioxide 238 Article 113 China 91 Climate change 80 Organic carbon 76 Biomass 75 carbon dioxide 73 Ecosystems 69 Sustainable development 69 Forestry 66 nonhuman 66 Greenhouse gases 61 Activated carbon 59 controlled study 59 Global warming 56 Soils 55 human 55 carbon 54 Scanning electron microscopy 53 climate change 52 carbon emission 51 biomass 45 Adsorption 44 unclassified drug 43 Carbon emissions 42 Carbon nanotubes 42 Efficiency 42 Gas emissions 41 Nitrogen 40