Related by context. Frequent words. (Click for all words.) 63 ocean acidification 62 Global warming 59 ocean acidity 57 acidification 57 species extinctions 55 coral bleaching 54 stratospheric ozone 54 greenhouse warming 54 ocean ecosystems 52 atmospheric carbon dioxide 52 Overfishing 52 Carbon dioxide emissions 51 global warming 51 terrestrial ecosystems 51 Oxidative stress 50 oceans 50 marine ecosystems 50 mass extinctions 50 Volcanic eruptions 50 Sulfur dioxide 50 GLOBAL WARMING 50 mass extinction 50 Coral reefs 50 Acrylamide 49 Passive smoking 49 ozone depletion 49 climate change 49 atmospheric concentrations 49 atmospheric CO2 49 harmful algal blooms 49 algal blooms 49 Phytoplankton 48 extinctions 48 greenhouse gas concentrations 48 oxygen depletion 48 overfishing 48 Global Warming 48 Greenhouse gases 48 protective ozone layer 48 Wind shear 48 marine ecosystem 48 hydrological cycle 48 Serreze 48 anthropogenic climate 47 Carbon dioxide 47 Pandemic flu 47 manmade global warming 47 freshwater ecosystems 47 Invasive species 47 Deforestation 47 gyre 46 chytrid fungus 46 Insulin resistance 46 sun ultraviolet rays 46 coral reefs 46 atmospheric circulation 46 Particulate matter 46 Geoengineering 46 Greenland ice 46 subtropical regions 46 Tooth decay 46 coastal ecosystems 46 anthropogenic 46 algal bloom 46 algae blooms 46 Trans fat 46 eutrophication 46 ozone layer 46 sunspot cycle 45 microscopic algae 45 geomagnetic storms 45 plankton 45 Overpopulation 45 longline fishing 45 Childhood obesity 45 Greenland glaciers 45 marine organisms 45 spiny dogfish 44 icecap 44 sunspot activity 44 carbonic acid 44 seagrasses 44 chlorofluorocarbons CFCs 44 acid rain 44 toxic algae 44 melting polar 44 marine biodiversity 44 varroa mite 44 phytoplankton 44 Coral Reefs 44 anthropogenic global warming 44 methyl mercury 43 thermosphere 43 CO2 concentrations 43 aquatic ecosystems 43 Melting ice 43 Antarctic Ice 43 chlorofluorocarbons 43 gigatonnes 43 vertical wind shear 43 Antarctic ice