Related by context. Frequent words. (Click for all words.) 62 gigatonnes 61 gigatons 61 megatons 55 megatonnes 53 kiloton 53 megaton 51 CO2e 51 CO2 emitted 49 joules 48 kilotonnes 48 greenhouse gasses 48 Co2 48 heat trapping carbon dioxide 47 carbon dioxide 47 carbon dioxide emitted 47 Ocean acidification 47 kilotons 47 carbon emitted 46 CO2 46 warming gases 46 gigawatt 46 greenhouse gases 45 GHGs 44 greenhouse gas 44 greenhouse gas emission reductions 44 atmospheric carbon dioxide 44 carbon dioxide CO2 44 carbon emissions 44 nitrous oxide emissions 44 conventional warhead 44 carbon emission reductions 44 carbon dioxide emissions 44 greenhouse gas emitting 44 heat trapping greenhouse gases 44 atmospheric CO2 43 carbon dioxide emission 43 CO2 emissions 43 nitrous oxides 43 sulfur dioxide SO2 43 Carbon dioxide emissions 43 Carbon dioxide 43 Gt 43 atmospheric concentrations 43 GHG emission 43 heat trapping 43 absorbing carbon dioxide 43 greenhouse gases emitted 43 greenhouse emissions 43 Greenhouse Gases 43 greenhouse gas emissions 42 trillionth 42 glacial melt 42 fossil fuel 42 sulfur oxides 42 species extinctions 42 carbon dioxide methane 42 reducing carbon emissions 42 earths 42 aerosol particles 42 ten thousandth 42 carbon emitter 42 teaspoonful 42 millionths 42 cubic 42 Sulfur dioxide 42 #Mt [002] 42 greenhouse gas GHG emissions 42 Waxman Markey 41 icecap 41 Greenland Ice 41 methane 41 N2O 41 cubic centimeter 41 CO2 concentrations 41 carbon emitters 41 greenhouse gas GHG 41 equivalent 41 greenhouse gas emitter 41 greenhouse warming 41 climate change 41 metric tons 41 greenhouse gas concentrations 41 fossil fuels 41 #/#th [001] 41 gigaflops 41 emission reductions 41 gigawatts GW 40 #,#,#,#,# [013] 40 Greenland glaciers 40 magnitude 40 Tunguska 40 Carbon Dioxide 40 C# emissions 40 #ppm [001] 40 nanometers thick 40 dioxide 40 greenhouse gas emitters 40 carbon dioxide CO2 emissions 40 mass extinction 40 trillion bytes 40 seismically active regions