Related by context. Frequent words. (Click for all words.) 57 gigatonnes 53 gigatons 52 greenhouse gas concentrations 52 atmospheric CO2 51 atmospheric concentrations 51 atmospheric carbon dioxide 49 Carbon dioxide emissions 47 CO2 concentrations 47 greenhouse gases 46 heat trapping gases 46 warming gases 46 greenhouse gasses 46 heat trapping carbon dioxide 45 greenhouse emissions 44 carbon dioxide emission 44 degree centigrade 44 greenhouse gas emissions 44 carbon dioxide emissions 44 #.#C [002] 44 extinctions 44 GHGs 44 greenhouse gas emission reductions 44 fleetwide average 44 megatonnes 43 heat trapping emissions 43 floods droughts 43 carbon dioxide 43 nitrous oxide emissions 43 Greenhouse gases 43 #ppm [001] 43 CO2 emissions 43 Gt 42 emission reductions 42 anthropogenic 42 greenhouse warming 42 global warming gases 42 global warming 42 ocean acidification 42 emissions 42 nitrogen phosphorus 42 degrees Fahrenheit 42 ozone depletion 41 Co2 41 carbon dioxide methane 41 greenhouse gas 41 plugin document.write 41 degrees Celsius 41 CO2 41 C# emissions 41 degree Fahrenheit 41 pollutants 41 curbing greenhouse gases 41 ° Celsius 41 alkalinity 40 degrees centigrade 40 reducing carbon emissions 40 carbon emissions 40 degrees Centigrade 40 pollutant emissions 40 smokestack emissions 40 degree Celsius 40 salinity 40 climate change 40 greenhouse gas emitting 40 mass extinctions 40 legally binding commitments 40 Jarraud 40 nitrogen oxide emissions 40 droughts floods 40 degrees Celcius 40 Pielke 40 carbon dioxide CO2 39 heat trapping greenhouse gases 39 Minister Sigmar Gabriel 39 technologically feasible 39 º C 39 burning fossil fuels 39 nitrogen oxides NOx 39 climatologists 39 legally binding treaty 39 greenhouses gases 39 carbon dioxide CO2 emissions 39 albedo 39 melting glaciers 39 nutrient pollution 39 particulate matter PM 39 greenhouse gas emitter 39 Greenhouse Gases 39 Greenland ice 39 carbon emitter 39 degrees warmer 39 Carlgren 39 greenhouse gas emitters 39 GHG emissions 39 ppm 38 greenhouse gas GHG emissions 38 Climate Change IPCC 38 dissolved solids 38 greenhouse gas emission 38 pollutant 38 acidification