Related by context. Frequent words. (Click for all words.) 44 Poison ivy 42 Ocean acidification 40 acidifying 40 glaciers melt 40 oxidizes 40 decomposes 39 occurs naturally 39 isoprene 39 Carbon dioxide 39 acid rain 39 fungus 39 urushiol 38 sequester carbon 38 hibernates 38 atmospheric carbon dioxide 38 stratospheric ozone layer 37 carbon sinks 37 germinates 37 protective ozone layer 37 infects humans 37 emits 37 adelgid 37 regenerates 37 species extinctions 37 Sulfur dioxide 36 atmospheric methane 36 Global warming 36 fertilizes 36 warms 36 refreezes 36 absorb carbon dioxide 36 incomplete combustion 35 penetrates 35 Volcanic eruptions 35 Deforestation 35 dioxide 35 deforestation 34 cools 34 carbon dioxide 34 atmospheric CO2 34 hemlock trees 34 greenhouse gasses 34 rots 34 dehydrates 33 pollutant 33 emitter 33 emitting greenhouse gases 33 decays 33 behaves differently 33 Carbon dioxide emissions 33 carbon sequestration 33 contaminates 33 sulfur dioxide nitrogen oxides 33 butter melts 33 sulfur dioxide SO2 33 pollutes 33 Co2 33 greenhouse gases emitted 33 CO2 concentrations 33 ocean acidity 33 compacted soil 32 ecological catastrophe 32 soil erosion 32 revalues 32 nitrous oxide emissions 32 CO2 32 acrolein 32 stratospheric ozone 32 amphibian populations 32 overheats 32 nitrogen 32 deforms 32 carbon dioxide CO2 32 excretes 32 recovers 32 oxidize 32 ozone smog 32 N2O 32 Greenhouse gases 32 pine beetle infestation 32 terrestrial ecosystems 32 GLOBAL WARMING 32 stabilizes 31 liquefies 31 ozone depletion 31 gases emitted 31 polycyclic aromatic hydrocarbons 31 attaches 31 El Nino warming 31 sulphates 31 chlorofluorocarbons 31 Invasive species 31 ozone concentrations 31 heat trapping carbon dioxide 31 sun ultraviolet rays 31 carbon emitted 31 glows 31 nitrous oxides 31 greenhouse gas concentrations 31 greenhouse warming 31 ultra violet rays