Related by context. Frequent words. (Click for all words.) 50 unnatural 46 severe droughts 44 hydrothermal activity 44 Volcanic eruptions 44 hydrological cycle 43 rampant deforestation 43 anthropogenic 43 glaciers melt 43 Deepwater Horizon blowout 42 volcanism 42 upwellings 42 manmade catastrophe 41 deglaciation 41 methane hydrate 40 species extinctions 40 El Niños 40 phenomena 40 Ixtoc spill 40 atmospheric methane 40 Cambrian explosion 40 phytoplankton blooms 40 meteorite impacts 40 ecological degradation 40 hydrologic cycle 39 plankton blooms 39 glaciations 39 carnal intercourse 39 sexual dimorphism 39 Solar flares 39 ecological disasters 39 Younger Dryas 39 anthropogenic climate 38 Deepwater Horizon offshore drilling 38 undersea plumes 38 drilling rig exploded 38 Ocean acidification 38 Ultraviolet radiation 38 mass extinction 38 deepwater wells 38 extinctions 38 hermaphrodites 38 naturally occurring substance 38 multicellular organisms 38 ecological catastrophe 37 genital organs 37 endocrine disrupting chemicals 37 glacial melting 37 aurorae 37 endocrine disruption 37 downright creepy 37 Tidal waves 37 nonhuman animals 37 occurances 37 prolonged droughts 37 fossilization 37 Melting glaciers 37 salination 37 asexuality 37 naturally occurring substances 37 earthquakes 37 occurences 37 volcanic eruptions 37 manmade 37 urushiol 37 Saturated fats 37 eruptions 37 Horizon exploded 37 Toxic chemicals 37 reproduce asexually 37 rig exploded 36 megaquake 36 catastrophy 36 volcanic eruption 36 greenhouse warming 36 terrestrial ecosystems 36 mass extinctions 36 Deepwater Horizon exploded 36 earthquakes volcanoes 36 magnetars 36 gravely immoral 36 melting permafrost 36 natural 36 Physiologically 36 depletion 36 thawing permafrost 36 anoxia 36 vortices 36 copulation 36 orifices 36 Gamma ray bursts 36 intrinsically disordered 36 auto erotic asphyxiation 36 whale strandings 36 substorm 36 primeval 36 convergent evolution 36 undersea earthquakes 36 upwelling 36 quakes measuring 36 landforms 36 volcano eruption