Related by context. All words. (Click for frequent words.) 70 stratospheric ozone 70 Earth ozone layer 68 ozone layer 62 protective ozone layer 62 Antarctic ozone 59 Ozone layer 58 Ozone depletion 56 Ozone Layer 56 damaging ultraviolet rays 56 Antarctic stratosphere 56 harmful ultraviolet radiation 55 ozone depleting gases 54 ozone 53 sulphate aerosols 53 blocks harmful ultraviolet 53 sun ultraviolet rays 53 ozone layer shielding 53 Stratospheric ozone 52 ozone depletion 52 harmful ultraviolet UV radiation 52 boreal ecosystems 52 atmospheric ozone layer 52 stratospheric ozone depletion 51 atmospheric ozone 51 Antarctic ozone layer 51 Hotter drier 51 hydrological cycle 51 sequesters carbon 51 springtime ozone 51 ultraviolet UV rays 50 sulfate aerosols 50 peat lands 50 peat soils 50 gaseous pollutants 50 chlorofluorocarbons 50 ultra violet radiation 50 sun ultraviolet radiation 50 coastal mangrove forests 49 anthropogenic greenhouse gases 49 Warmer drier weather 49 chloroflourocarbons 49 reef habitats 49 Antarctic glacier 49 ozone depleting chemicals 49 atmospheric CO2 levels 49 ozone depleting substance 49 ultra violet rays 49 melt glaciers 49 Acidification 49 delicate ecosystems 49 Ultraviolet rays 49 marine ecosystems 49 damaging ultraviolet radiation 49 Overfishing pollution 48 stratospheric clouds 48 terrestrial ecosystems 48 oceanic circulation 48 deplete ozone 48 ozone depleting compounds 48 harmful ultraviolet 48 ecosystems 48 biosphere 48 reef ecosystems 48 meteorite impacts 48 chlorine monoxide 48 tropical coral reefs 48 phytoplankton bloom 48 hydrologic cycle 48 halons 47 Boreal forests 47 biodiverse ecosystems 47 icesheets 47 axial tilt 47 Ocean acidification 47 walrus polar bears 47 subglacial lakes 47 ozone depleting substances 47 ocean ecosystems 47 invisible odorless tasteless 47 sun UV rays 47 coral reef biodiversity 47 icecaps 47 coastal ecosystems 47 carbon sinks 47 Coral bleaching 47 Carbon dioxide CO2 47 nightglow 47 carbon dioxide concentrations 47 hydrochlorofluorocarbons HCFCs 47 deforestation overfishing 47 freshwater ecosystems 47 Appy Sluijs 47 flood basalts 47 CFCs 47 marine phytoplankton 47 root rots 47 aerosol particles 47 nitrogen leaching 47 glacier retreat 47 degraded ecosystems 47 sulfur dioxide SO2 47 atmospheric circulation 47 ice nucleation 47 Warmer oceans 47 mangrove ecosystems 46 harmful ultraviolet rays 46 atmospheric carbon dioxide 46 thermohaline circulation 46 silicate rocks 46 fragile marine ecosystems 46 glacier melts 46 hypoxic zone 46 methyl chloroform 46 reef organisms 46 CFCs chlorofluorocarbons 46 deepwater corals 46 chlorofluorocarbon gases 46 glacial meltwater 46 marine ecosystem 46 glacial interglacial cycles 46 harmful ultra violet 46 aerosol propellants 46 tropospheric ozone 46 sun harmful ultraviolet 46 cyclonic storms 46 Sulfur dioxide 46 greenhouse gases GHGs 46 ultraviolet UV radiation 46 polar regions 46 Orbiting Carbon Observatory OCO 46 Boreal forest 46 acidification 46 Canada Boreal Forest 46 permafrost melts 46 permafrost degradation 46 methane burps 46 R #a refrigerant 46 depleting substances 46 heme oxygenase 46 mold fungus 46 coral reefs 46 endangered rainforests 45 Particulate pollution 45 absorbing carbon dioxide 45 Tharsis Rise 45 polar caps 45 cryosphere 45 retreating glaciers 45 photosynthetic apparatus 45 atmospheric circulations 45 elkhorn corals 45 biogeochemical processes 45 frost heaving 45 anthropogenically 45 Ultraviolet radiation 45 irrigations systems 45 atmospheric CO2 45 peatlands 45 sulphates 45 deplete oxygen 45 wetland ecosystem 45 coccolithophores 45 tropical savanna 45 coral reef ecosystems 45 phagocytes inhibiting NADPH oxidase 45 midlatitudes 45 dermal layers 45 Earth biosphere 45 Montreal Protocol 45 Arctic permafrost 45 ozone layer depletion 45 planet magnetosphere 45 chlorofluorocarbons CFCs 45 aquatic ecosystems 45 Arctic icecap 45 coral bleaching 45 coralline algae 45 Domoic acid neurotoxin 45 icesheet 45 soil salinity 45 Warmer seas 45 Halons 45 absorb carbon dioxide 45 atmospheric aerosols 45 sulfur aerosols 45 cenospheres 45 Ian McShane Pillars 45 Ozone Hole 45 Ultraviolet UV radiation 45 tailpipe gases 45 Zeebe 45 sulfur isotope 45 insect outbreaks 45 streambanks 45 ozone depleting chlorofluorocarbons 45 ultraviolet sunlight 44 anthropogenic carbon dioxide 44 ocean basins 44 ozone O3 44 Kharecha 44 seabed sediments 44 boreal regions 44 tiny airborne particles 44 acidifying 44 acidifying oceans 44 Ross Salawitch 44 nutrient depletion 44 anthropogenic aerosols 44 subsurface ocean 44 algal toxins 44 duff layer 44 acid rain 44 freshwater aquifers 44 meridional overturning circulation 44 biodiverse regions 44 Rossby waves 44 ozone depleting refrigerants 44 vernal pool habitat 44 volcanic plumes 44 airglow 44 ultraviolet UV light 44 Jellyfish swarm northward 44 groundwater depletion 44 albedo feedback 44 planet habitability 44 sulphate particles 44 Himalayan river basins 44 underground geologic formations 44 Chlorofluorocarbons 44 glaciations 44 Quaternary Period 44 Amazonian forest 44 magnetic substorms 44 Amundsen Sea 44 Moisture laden 44 sulfuric acid mist 44 coral reef ecosystem 44 Nitrogen oxides 44 peat swamp forests 44 GHG concentrations 44 cork oak forests 44 anthropogenic greenhouse gas 44 Late Paleozoic 44 manmade greenhouse gas 44 wetland ecosystems 44 fine grained sediment 44 vernal pool species 44 Kyoto Protocal 44 upper troposphere 44 biodiversity hotspot 44 hydroxyl radicals 44 atmospheric CO 44 inversion layer 44 tropical rainforests 44 Subarctic 44 atmospheric nitrogen 44 biogeochemical cycling 44 wiliwili trees 44 airborne pollutant 44 coral reef degradation 44 nitrates phosphates 44 Cow burps 44 absorbs carbon dioxide 44 glaciers receded 44 wetland soils 44 sub glacial lakes 44 Saharan dust 44 martian atmosphere 44 fungal organisms 44 biogeochemical cycles 44 sulfur dioxide pollution 44 coastal wetlands 44 active volcanism 44 polar oceans 44 migratory bird habitat 44 GJ#b 44 volcanic eruptions 44 lung irritant 44 Polluted runoff 44 melting permafrost 44 Atlantic meridional overturning 44 methane CH4 44 Thawing permafrost 44 permafrost thaws 44 carbon dioxide 43 mesosphere 43 longleaf pine ecosystem 43 Streptococcus pneumoniae S. pneumoniae 43 coral ecosystems 43 magnetosphere 43 hydrosphere 43 streamside habitat 43 Hydrogen Sulfide H2S 43 Boreal Forest 43 temperate rainforests 43 bioavailable iron 43 coastal marine ecosystems 43 eroding shorelines 43 Polycyclic aromatic hydrocarbons 43 sulfate aerosol 43 ocean acidity 43 weed infestation 43 seafloor sediments 43 fluorinated gases 43 Landslips 43 Mangrove forests 43 benthos 43 streambank erosion 43 photochemical reaction 43 Carbon tetrachloride 43 refugia 43 subglacial 43 towering icebergs 43 chlorofluorocarbon 43 SeaWiFS 43 vulnerable thermal shielding 43 larvae burrow 43 Methylmercury 43 aerosols 43 atmospheric methane 43 glacial interglacial 43 alpine glaciers 43 emitting fossil fuels 43 aquatic fauna 43 anthropogenic CO2 43 forest ecosystems 43 galactic cosmic rays 43 climate forcings 43 tropical forests 43 greenhouse warming 43 planktons 43 Greenland Glaciers 43 enormous sperm whales 43 Tropical rainforests 43 acidic oceans 43 sulfur dioxide SO2 emissions 43 deep convective clouds 43 biodiversity 43 dehumidifying 43 peatland forests 43 carbon dioxide CO2 43 osmotic stress 43 hydroxyl radical 43 bacteria mold mildew 43 Daisetta sits 43 geomagnetic substorms 43 global warming gasses 43 Greenhouse gasses 43 bacterial decomposition 43 Ultraviolet light 43 sunspot cluster 43 climatic variations 43 reefs 43 shipworm 43 carbonate globules 43 Peatlands 43 microscopic bubbles 43 calcium carbonate shells 43 condensation nuclei 43 phytoplankton blooms 43 amplification Zwally 43 wildlife habitats 43 coastal temperate rainforest 43 exosphere 43 dangerous anthropogenic interference 43 migratory bird habitats 43 anthropogenic emissions 43 cyclones droughts 43 coral habitats 43 beech forests 43 Polar Regions 43 heat trapping pollutants 43 longwave radiation 43 Elevated CO2 43 cosmic rays 43 amphibian populations 43 mangrove vegetation 43 Amazonian rainforest 43 microbial biofilms 43 halon 43 oxide hydrofluorocarbons perfluorocarbons 43 Palaeocene Eocene Thermal Maximum 43 chlorofluorocarbons CFC 43 fissure eruption 43 hydrofluorocarbons HFCs 43 species extinctions 43 lithosphere 43 soot smog 43 Milankovitch cycles 43 Mount Kilimanjaro glaciers 42 Einstein relativity theory 42 anthropogenic CO2 emissions 42 silicon monoxide 42 mid latitudes 42 sulfuryl fluoride 42 peat bogs 42 teleconnections 42 carbonate minerals 42 tropopause 42 Permian Triassic 42 Nitrogen Oxides 42 replanting forests 42 boreal forests 42 Stomach banding causes 42 planetary warming 42 amplifying feedbacks 42 methane clathrates 42 ozone pollutant 42 overlying layers 42 phytoplankton 42 thermosphere 42 invertebrate populations 42 El Nino periodic 42 dikes dams 42 orangutan habitats 42 biogeochemical 42 floods droughts heatwaves 42 Volatile organic compounds 42 migratory bird populations 42 melts Himalayan glaciers 42 estuarine ecosystem 42 Warmer wetter weather 42 ozone depleting CFCs 42 sequester atmospheric 42 Paleocene Eocene Thermal Maximum 42 oceans 42 groundwater seepage 42 filter impurities 42 oligotrophic 42 tropical savannas 42 greenhouse gases GHG 42 Otto Bliesner 42 refrigerant gases 42 photochemical smog 42 Maya Biosphere Reserve 42 synthetic nitrogen fertilizer 42 Anthropogenic 42 waves droughts floods 42 deca BDEs 42 hydrofluorocarbon 42 salmon spawning grounds 42 volcanoes erupt 42 Longmen Shan fault 42 stony coral 42 undersea volcanic 42 aquatic habitats 42 Excessive moisture 42 isotope fractionation 42 temperate rainforest 42 tephra dam 42 Methane CH4 42 Coral reef 42 micro meteorites 42 biota 42 sea turtle populations 42 seawater pH 42 tropical peatlands 42 Bottom trawling 42 forms carbonic acid 42 laser irradiation 42 melting polar icecaps 42 microbialites 42 greenhouse gas nitrous oxide 42 thermal inertia 42 IllumiNations Reflections 42 atmospheric deposition 42 Siple Dome 42 marine biota 42 Everglades ecosystem 42 greenhouse gas concentrations 42 naturally occurring algae 42 dwelling organisms 42 seagrass meadows 42 ionized gases 42 salamander habitat 42 carbondioxide 42 anomalously warm 42 honey bee populations 42 greenhouse gases endangers 42 myelin sheaths 42 matrix interferences 42 periodic dimming 42 alpine ecosystems 42 soil biota 42 ultra violet UV rays 42 earths crust 42 decaying vegetation 42 deglaciation 42 Atmospheric CO2 42 CO2 concentrations 42 nutrient leaching 42 tectonic uplift 42 CryoSat satellite 42 Nitrogen oxide 42 sulfur gases 42 hoofed critters 42 Greenland icesheet 42 Gigatonnes 42 Ozone Depletion 42 Methyl bromide 42 Soot particles 42 overstory 42 scarps indicating 42 chlorophyll fluorescence 42 Gamma ray burst 42 Rainforests 42 asteroid impacts 42 Arctic oscillation 42 Ozone Depleting Substances ODS 42 soil crusting 42 sheet Summerhayes 42 particulate matter nitrogen oxides 42 coral reef habitats 42 terrestrial biosphere 42 phytoplankton zooplankton 42 sequoia groves 42 Syrtis Major 41 sulfur dioxide 41 larynx abdomen face 41 freshwater habitats 41 Mercury flyby 41 karst landscapes 41 Greenhouse gases trap 41 rhythmic disturbances 41 heatwaves floods droughts 41 crustal 41 orbiting observatories 41 perfluorinated compounds PFCs 41 groundwater contaminant 41 iceberg calving 41 Atlantic thermohaline circulation 41 bacteria Bacillus anthracis 41 biotopes 41 CFC propellants 41 Upsilon Andromedae b 41 Chlorofluorocarbons CFCs 41 Himalayan Glaciers 41 damming rivers 41 refrigerant leaks 41 wetland vegetation 41 dissolved oxygen pH 41 seals walrus 41 #.#C #.#F [003] 41 topsoil erosion 41 aspen stands 41 KT extinction 41 oVOCs 41 microbiological contamination 41 Jay Famiglietti 41 alter nutrient absorption 41 ozone particulates 41 photosynthesising 41 tall thick trunked 41 Follett Pillars 41 peatland 41 Sovi Basin 41 Peat bogs 41 carbonyl sulfide 41 halocarbons 41 HFC refrigerants 41 heatwaves droughts 41 microbial decomposition 41 moulins 41 magnetic polarity 41 Kilauea wafts 41 bark beetle outbreak 41 albedo 41 conserves moisture 41 microscopic algae 41 rewetting 41 produced Friedlingstein 41 endangered manatees 41 mountain glaciers 41 clathrates 41 Siberian Traps 41 chemical ammonium perfluorooctanoate 41 understory vegetation 41 Laurentide ice sheet 41 absorbs CO2 41 aquatic ecosystem 41 radiational 41 smog acid 41 stabilizing atmospheric concentrations 41 subpolar 41 meltoff 41 upland forests 41 polar vortex 41 nitrogen deposition 41 Carbon Dioxide CO2 41 clogs airways 41 porous sandstone 41 meteorological phenomena 41 windblown sand 41 volcanic aerosols 41 Moapa dace 41 Peatland 41 Breathing ozone 41 orang utan habitat 41 Plate tectonics 41 Carl Gustaf Lundin 41 toxic algal blooms 41 biologically diverse ecosystems 41 Alpine glaciers 41 particulate matter soot 41 fluorotelomers 41 freshwater springs 41 staghorn corals 41 stomatal conductance 41 harmful algal bloom 41 spruce budworm 41 soil carbon sequestration 41 floods heatwaves droughts 41 hydrogen sulfide H2S 41 multi decadal 41 GHG emitted 41 Ragweed pollen 41 salinisation 41 Martian dunes 41 compacted soils 41 airborne pollutants 41 permafrost 41 COROT 7b 41 cyanobacterial blooms 41 migratory waterbirds 41 recharge groundwater 41 anthropogenic CO 41 mantle convection 41 planetwide 41 fluorocarbons 41 halogenated hydrocarbons 41 Younger Dryas 41 blister rust 41 methanogenesis 41 vegetations 41 Particulate emissions 41 corals 41 oxidization 41 2oC 41 atmospheric moisture 41 hydrogen sulphide H2S 41 pristine coral reef 41 pandemic influenza strains 41 Tropical deforestation 41 hydrofluorocarbon HFC 41 single celled microorganisms 41 Calcium chloride 41 refrigerants 41 calcifying organisms 41 respiratory irritant 41 Prescribed burning 41 carbonic acid 41 floodplains wetlands 41 Cryogenian 41 vibrios 41 brook trout habitat 41 El Niño Southern Oscillation 41 carbon monoxide nitrogen dioxide 41 pine bark beetle 41 isoprene 41 wetland habitats 41 lodgepole forests 41 lodgepole pine forests 41 wolverine habitat 41 freshwater wetlands 41 deforestation desertification 41 Seagrasses 41 greenhouse gases 41 anthropogenic interference 41 Sulphur dioxide 41 turtle nesting beaches 41 sediments deposited 41 predatory fishes 41 stockpiled cluster munitions 41 ozone munching 41 marine biodiversity 41 peroxynitrite 41 seagrasses 41 Phytoplankton 41 nutrient inputs 41 micrometeoroids 41 greatest insect emergences 41 early successional forest 41 huarango 41 Cerrado 41 Starz Pillars 41 mammal extinctions 41 acid sulfate 41 carbon sequestered 41 CFCs HCFCs 41 Subterranean termites 41 aerosol concentrations 41 Ayles Ice Shelf 41 desertified land 41 depletes oxygen 41 photochemical reactions 41 UVA radiation 41 climatic variability 41 equatorial Pacific Ocean 41 extremophile bacteria 41 Microlensing 41 thermal gradients 41 Antarctic krill 41 Martian atmosphere 41 CO2 CH4 40 thereby amplifies 40 habitats 40 megafauna extinction 40 Brackish water 40 nitrogen oxide NOX 40 corrodes metal 40 staghorn coral 40 Amazon Rainforest 40 harmful ultraviolet UV 40 droughts floods storms 40 photosynthetic organisms 40 bacteria Streptococcus pneumoniae 40 Brigham Grette 40 Mercury magnetosphere 40 atmospheric chemistry 40 recrystallization 40 smooth cordgrass 40 biospheres 40 heatwaves floods 40 dangerously overheat 40 teragrams 40 UV radiation 40 plankton blooms 40 toxic gasses 40 cambium layer 40 oxidized mercury 40 potent greenhouse gas 40 Ultrafine particles 40 autoimmune diseases peramivir 40 reactive oxygen species 40 headwater stream 40 lowermost mantle 40 GtC 40 Nitrate contamination 40 nitrification 40 runaway greenhouse 40 mountain snowpacks 40 anthropogenic 40 superoxides 40 chlorine peroxide 40 riverine ecosystems 40 particulate pollutants 40 orangutan habitat 40 harmful algae blooms 40 oxidises 40 nesting seabirds 40 chemosynthetic 40 photic zone 40 evapo transpiration 40 acidify 40 Mass Extinction 40 garigue 40 RNA enzymes 40 lunar crust 40 zinc oxide nanoparticles 40 vessel groundings 40 boreal forest 40 hydrothermal fluid 40 peat swamps 40 World Meteorological Organisation 40 nearshore marine 40 McMurdo Dry Valleys 40 aquatic biota 40 glycation 40 corals sponges 40 Oxidative stress 40 chlorofluorocarbon CFC 40 nutrient discharges 40 hydrochlorofluorocarbon HCFC 40 leaf scorch 40 HABs 40 temperature gradients 40 headwater streams 40 airborne particulate matter 40 atmospheric pollutants 40 warmings 40 Global Warming Potential GWP 40 seagrass habitat 40 fisheries wildlife refuges 40 Patagonian glaciers 40 Greenhouse gases 40 Lake Untersee 40 photosynthetic machinery 40 bioaerosol 40 CO ₂ 40 convection currents 40 geoengineering schemes 40 rare wekiu bug 40 meltwater 40 conserve biodiversity 40 Qinghai Tibet plateau 40 Antarctic icesheet 40 Eyjafjallajökull erupted 40 mildly alkaline 40 hydrological cycles 40 halogenated gases 40 chytrid 40 tropospheric 40 Amazonian forests 40 atmospheric 40 bacterial spores 40 Mount Pinatubo exploded 40 pollutes waterways 40 pristine Drakes Estero 40 Great Barrier reef 40 cometary impacts 40 equatorial bulge 40 reactive nitrogen 40 amorphous silica 40 mesospheric 40 carbon dioxide CO ² 40 UV rays 40 Saturated soil 40 groundwater aquifers 40 planetary atmospheres 40 acidity pH 40 meteor impacts 40 oxidative stresses 40 solar corona 40 colorless odorless poisonous 40 HCFC #b 40 solar flares 40 invasive insect 40 biogeochemical cycle 40 subduction zone earthquake 40 cosmic ray intensity 40 seafloors 40 Methyl mercury 40 tiny single celled 40 ecoregion 40 reactive oxygen species ROS 40 ozone particulate matter 40 retinal ischemia 40 giant sequoia trees 40 Korty reiterated 40 Maui dolphin 40 biodiversity hotspots 40 ultraviolet rays 40 Seafloor 40 sun ultraviolet UV 40 calcium carbonate skeletons 40 N2O emissions 40 Harmful algal blooms 40 aquatic biodiversity 40 vegetation 40 Scientists theorize 40 solar irradiance 40 Permian Triassic extinction 40 dental enamel 40 single celled algae 40 corona discharge 40 photosynthetic microbes 40 insect infestations 40 Sumatran earthquake 40 Type Ia supernovas 40 sagebrush steppe 40 ozone precursor 40 coral 40 coronal loops 40 degrees Centigrade #.#F 40 pesticides herbicides fungicides 40 ozone concentrations 40 cosmic radiation 40 erosional 40 estuarine habitat 40 cork oak 40 endocrine disrupting chemicals EDCs 40 HFCs perfluorocarbons PFCs 40 blanket bog 40 Nitrogen dioxide 40 soot particles 40 marine sediments 40 magma chamber 40 hydroxyl molecules 40 Orbiting Carbon Observatory 40 heterotrophic 40 salt cedars 40 wiliwili 40 biofiltration 40 nitrous oxide N2O 40 Ulysses spacecraft 40 recontamination 40 Algae blooms 40 Carbon Dioxide 40 freshwater marsh 40 excrete methane 40 subtropical regions 40 harmful gasses 40 ship groundings 40 seamounts 40 sulfur dioxide SO2 nitrogen 40 Ocean acidification refers 40 pollutants 40 microorganism 40 smallest exoplanet 40 Greenland glaciers 40 glacier melt 40 heat trapping gases 40 riparian ecosystems 40 microbial organisms 40 poleward shift 40 golden toad 40 collisional 40 wreak untold 40 smog forming nitrogen oxide 40 Persistent Organic Pollutants POPs 40 basaltic rocks 40 bromine compounds 40 odorless colorless gas 40 moon gravitational pull 40 Carbon dioxide 40 Ordovician extinction 40 unlogged forests 40 dimethyl sulphide 40 ENSO cycle 40 Soil erosion 40 wetlands 40 Svedhem 40 oxidise 40 oxidants 40 olivine mineral 40 deciduous plants 40 radiative forcing 40 aquatic grasses 40 supervolcanoes 40 methanogenic bacteria 40 microcystins 40 Halifax Weather Overcast 40 Ozone Layer Protection 39 Coral Reef Conservation 39 Galapagos Archipelago 39 nitrogen oxides emitted 39 bark beetle infestations 39 intestinal flora 39 Nitrogen trifluoride 39 mixed conifer forests 39 HFC# 39 sedimentary layers 39 elevated atmospheric CO2 39 Late Ordovician 39 unventilated tunnel 39 Meteorology Ionosphere 39 Mercury exosphere 39 Earth 39 Elevated concentrations 39 sedimentary deposits 39 carbon dioxide nitrous oxide 39 gaseous methane 39 soot particulates 39 woody vegetation 39 orographic 39 airborne particulates 39 EPA Greenhouse gases 39 tidal wetland 39 burning fossil fuels 39 trihalomethanes THMs 39 coral polyps 39 greenhouse gases emitted 39 Roshelle Gaskins spokeswoman 39 freshwater wetland 39 upwellings 39 meteoroid 39 means luxuriously blooming 39 specular reflection 39 mega deltas 39 freshwater snails 39 Warmer drier 39 polar icecap 39 interannual 39 Nitrogen oxide emissions 39 polar stratospheric 39 crystalline silica dust 39 coral reef 39 drywall emits 39 mites pesticides 39 Asian longhorn beetle 39 photoaging 39 radiative transfer 39 ppmv 39 World Meteorological Organization 39 Carbon dioxide traps 39 coastal seabeds 39 Tunguska Siberia 39 water vapor condenses 39 combustion byproducts 39 nephropathy kidney 39 phytoplankton microscopic 39 explosive volcanism 39 ocean upwelling 39 subalpine meadows 39 dustier stormier atmosphere 39 Zooplankton 39 comets asteroids 39 bicarbonate ions 39 pollutant discharges