Related by context. Frequent words. (Click for all words.) 36 tropics 34 warming 33 arctic 32 Antarctica 32 warmer 32 temperate 31 polar 31 latitudes 30 warmer temperatures 30 frigid 28 colder 28 hot humid 27 Warming 27 Northern Hemisphere 27 warm 27 Arctic 26 warmed 26 chilly 26 Ice Age 25 volcanic eruptions 25 heatwave 25 humid 25 climatic 24 wetter 24 cold 24 temperatures 24 degree Celsius 24 polar ice 24 glaciers 24 drier 24 warms 24 droughts 23 coldest 23 climate 23 degrees Celsius 23 balmy 23 frosty 22 cooler 22 volcanic activity 22 cooler temperatures 22 changing 22 thickening 22 permafrost 22 warmest 22 Global warming 21 thawed 21 degrees Fahrenheit 21 desertification 21 steaming 21 Warm 20 hotter 20 melting 20 melting ice 20 global warming 20 burning fossil fuels 20 heated 20 Global Warming 19 thawing 19 El Nino 19 toasty 19 warmth 19 temperature 19 ° C 19 precipitation 19 La Niña 18 Temperature 18 climate change 18 El Niño 18 water vapor 17 soaking 17 cooling 17 chill 17 scorching 17 La Nina 17 cooled 16 melt 16 cools 15 Climate 15 depletion 14 heating 13 atmospheric 13 ozone layer 13 carbon dioxide 13 deforestation 13 heat 12 CO2 12 IPCC 12 Climate Change IPCC 11 thaw 11 greenhouse gases 10 reducing carbon emissions 10 heat trapping gases 9 buildup 9 carbon dioxide emissions 9 carbon emissions 9 shaking 8 snowmelt 8 slowing 8 greenhouse gas emissions 6 greenhouse emissions 3 drying