Greenhouse effect Activation energy 4 Temperature 4 Activated carbon 2 Agricultural wastes 2 Alkalinity 2 Antarctic Peninsula 2 Antarctica 2 Apparent activation energy 2 Arctic and Antarctic 2 Biomass 2 Biomass residues 2 CO 2 methanation 2 Carbon dioxide 2 Catalyst supports 2 Catalytic performance 2 Ceria 2 Cerium compounds 2 Cerium oxide 2 Char properties 2 Chars 2 Climate change 2 Climatology 2 Computer simulation 2 Doped ceria 2 Doped-ceria 2 Global warming 2 Greenhouse gases 2 Hazelnuts 2 Hydrogenation 2