Related by context. Frequent words. (Click for all words.) 52 Chernobyl disaster 50 spewed ash 46 Chernobyl 45 Union Carbide pesticide 44 Fukushima No.1 43 temperate zones 43 radioactive particles 43 radionuclides 42 crippled Fukushima Daiichi 42 radioactive fallout 42 Kelud 42 Chornobyl 41 temperate regions 41 subtropical regions 41 Union Carbide factory 41 Chernobyl reactor 40 Iceland Eyjafjallajokull volcano 40 crippled Fukushima 40 Fukushima Nuclear 40 methane concentrations 40 marine sediments 40 Okumamachi Fukushima Prefecture 40 Particulate matter 40 radioactivity 40 Kola Peninsula 40 ash spewed 39 volcanic plume 39 species extinctions 39 northern hemisphere 39 troposphere 39 Event Scale 39 Onahama 39 Radioactivity 39 Pripyat 39 spewing ash 39 ash spewing 39 Northern Hemisphere 39 equatorial Pacific Ocean 39 equator 38 equatorial Pacific 38 radioactive vapor 38 Fukushima Daiichi 38 Fukushima Dai Ichi 38 Younger Dryas 38 Dai ichi nuclear 38 odorless colorless gas 38 Tunguska 38 northern latitudes 38 Fukushima reactor 38 damaged Fukushima Daiichi 38 hotter summers 38 driest continent 37 radioactive substances 37 plume 37 Fukushima Daiichi nuclear 37 radioactive plume 37 SO2 emissions 37 spewing lava 37 atmospheric methane 37 latitudes 37 Drigg 37 Fukushima reactors 37 Japan stricken Fukushima 37 mid latitudes 37 interglacial 37 drilling rig exploded 37 Ruhr region 37 Tritium 37 radioactive tritium 37 interglacial period 37 ash plumes 37 downwind 37 glaciers melt 37 Fukushima nuclear 37 millisievert 37 Radioactive iodine 37 spewed 37 solar nebula 36 Alaska Mount Redoubt 36 radioactive waste 36 Polar Regions 36 Daiichi plant 36 crippled Fukushima nuclear 36 Nuke dump decision 36 particulate pollution 36 Plumes 36 Kashiwazaki Kariwa plant 36 uranium oxide 36 radioactive wastes 36 warmer drier 36 millirem 36 airborne pollutants 36 sulfur dioxide nitrogen oxide 36 Dai ichi complex 36 Fukushima Daiichi Nuclear 36 Cesium 36 TCE 36 equatorial regions 36 icecap 36 subtropics 36 crippled Fukushima Dai ichi