Related by context. Frequent words. (Click for all words.) 73 greenhouse gas concentrations 66 atmospheric carbon dioxide 65 atmospheric CO2 60 greenhouse warming 57 ozone depletion 53 anthropogenic 52 extinctions 52 mid latitudes 52 gigatons 51 Little Ice Age 51 mass extinctions 51 atmospheric circulation 49 degree Fahrenheit 49 Greenhouse gases 49 #ppm [001] 49 ocean acidification 48 Greenland ice 47 Carbon dioxide emissions 47 global warming 47 acidification 47 mass extinction 47 troposphere 47 degree Celsius 46 heat trapping carbon dioxide 46 GHGs 46 greenhouse gases 46 #.#C [002] 46 mountain glaciers 46 albedo 46 abundances 46 carbon dioxide methane 46 latitudes 45 polar regions 45 heat trapping greenhouse gases 45 aerosols 45 Antarctic ice 45 carbon dioxide 45 atmospheric 45 Carbon dioxide 45 degree centigrade 45 temperatures 45 decadal 45 volcanic eruptions 44 ENSO 44 greenhouse gasses 44 floods droughts 44 Concentrations 44 Jarraud 44 volcanism 44 climatologists 44 melting glaciers 44 heat trapping gases 44 temperate regions 44 polar ice 44 Pliocene 44 water vapor 44 permafrost 44 ppm 44 glaciers 43 manmade global warming 43 radiocarbon 43 heat trapping 43 heat trapping emissions 43 supernovae 43 carbon dioxide CO2 43 crop yields 43 IPCC 43 volcanic activity 43 coral bleaching 43 warming gases 42 concentrations 42 CO2 42 ° Celsius 42 degrees Fahrenheit 42 Climatologists 42 climate change 42 glacial ice 42 WMO 42 subduction zones 42 climatological 42 warming 42 Global warming 42 oceans 42 equatorial Pacific 42 ozone layer 42 heatwaves 42 monsoon rainfall 42 degrees Celsius 42 cosmic rays 42 Martian atmosphere 41 burning fossil fuels 41 sunspots 41 fluxes 41 greenhouse emissions 41 greenhouse gas emissions 41 atmospheric chemistry 41 phytoplankton 41 climatic 41 anthropogenic global warming 41 ozone 41 glaciation