Related by context. Frequent words. (Click for all words.) 61 preindustrial levels 61 F above preindustrial 57 greenhouse gas concentrations 56 degrees Celsius 55 degree centigrade 53 degree Celsius 52 atmospheric CO 52 ˚ C 52 degrees Fahrenheit 52 #.#C [002] 51 degrees Centigrade 51 CO2 concentrations 50 heat trapping gases 49 degrees celsius 49 degrees centigrade 49 Industrialized nations 49 ° Celsius 49 #.#C [004] 49 ° C 49 atmospheric concentrations 49 species extinctions 48 degrees Farenheit 48 degrees Celcius 48 atmospheric carbon dioxide 47 gigatonnes 47 atmospheric CO2 47 degree Fahrenheit 46 By Julian Pecquet 46 heat trapping greenhouse gases 46 warming gases 46 Industrialized countries 46 subtropical regions 46 floods droughts 45 Daytime highs 45 extinctions 45 greenhouse gases 45 degree celsius 45 º C 45 preindustrial 44 droughts floods 44 greenhouse warming 44 gigatons 44 nmol L 44 ozone depletion 44 deg C 43 #F #C [002] 43 deg C. 43 sunspot cycle 43 interglacial period 43 degrees warmer 43 ocean acidity 43 gases blamed 43 equatorial Pacific Ocean 42 Little Ice Age 42 atmospheric methane 42 snowfall accumulations 42 centigrade 42 temperatures 42 2C 42 Tonight Mostly cloudy 42 Greenhouse gases 42 windchills 42 kg/m2 42 frequent droughts 41 wind chill readings 41 greenhouse gases GHG 41 greenhouse emission 41 sunspot activity 41 Wind chills 41 Today Mostly sunny 41 ° C. 41 celsius 41 ° F 41 Daytime temperatures 41 global warming gases 41 gametime temperature 41 greenhouse emissions 41 heat trapping carbon dioxide 41 Snow accumulations 41 climate modelers 41 legally binding treaty 41 global warming 41 ozone smog 41 driest continent 41 industrialized countries 41 Overnight lows 40 emission reductions 40 º C. 40 Wind chill 40 meteorologists predict 40 temperate zones 40 Southerly winds 40 interglacial 40 daytime highs 40 ozone depleting chemicals 40 greenhouse gas emissions 40 troposphere 40 Kyoto Protocol expires 40 fleetwide average 40 Toyako Japan 40 Pliocene