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(Click for frequent words.) 55 anthropogenic greenhouse gas 52 humans Homo sapiens 52 ppmv 52 atmospheric CO2 concentration 52 Industrial Revolution 52 preindustrial times 52 Upper Palaeolithic 51 Upper Paleolithic 51 Cenozoic Era 50 neolithic 50 Palaeolithic 50 mid Pliocene 50 Neolithic Period 50 Inca civilization 50 glaciers melted 50 Xia Dynasty 50 Middle Paleolithic 49 palaeolithic 49 Mesozoic era 49 ° C warmer 49 Vesuvius erupted 49 atmospheric CO 49 atmospheric CO2 concentrations 48 Last Glacial Maximum 48 carbon dioxide concentrations 48 Devonian Period 48 Neolithic 48 Mesopotamian civilization 48 Pleistocene epoch 48 atmospheric CO2 levels 48 interglacial period 48 GtC 48 carboniferous 48 degrees Fahrenheit warmer 48 biocapacity 48 barren sand dunes 48 Oligocene epoch 48 Appy Sluijs 48 Triassic Period 47 glaciers retreated 47 Inca Empire 47 Paleolithic era 47 the#th century 47 mammal extinctions 47 nomadic hunter gatherers 47 Paleolithic 47 #.#C #.#F [003] 47 Ediacaran 47 Incan Empire 47 Medieval Warming 47 interglacial 47 Pliocene 46 Carboniferous Period 46 Pleistocene Ice Age 46 Pliocene epoch 46 Mesolithic 46 underground aqueducts 46 anthropogenic emissions 46 Kyoto obliges 46 Pleistocene Epoch 46 urbanization industrialization 46 Yuan Dynasty #-# 46 terrestrial vertebrate 46 Nabataean 46 gigatonne 46 Moche culture 46 km3 46 gigatonnes 46 Hadean 46 Mongol empire 46 Minoan civilization 46 tigers roamed 46 Permian Period 46 premodern 46 Neolithic Age 46 Noachian era 46 Pleistocene Age 45 Jurassic Period 45 interglacials 45 tropical coral reefs 45 ppbv 45 Indus civilization 45 Mesozoic mammals 45 Late Cretaceous Period 45 H. sapiens 45 Cretaceous Period 45 prehistorical 45 Incans 45 Natufian 45 #th century 45 prairies deserts 45 Miocene epoch 45 desertified 45 Middle Pleistocene 45 Paleolithic Age 45 Paleoindian 45 bleachings 45 ancient Mesopotamia 45 megadroughts 45 Kushitic 45 degrees Celsius above preindustrial 45 Liao Dynasty 45 Kyoto binds 45 Greenland Antarctica 45 boreal regions 45 drylands 45 Europasaurus 45 Little Ice Age 45 Beringia 45 hunter gatherers 45 Pleistocene era 45 Engel coefficient 45 Himalayan plateau 45 equatorial forests 45 Permian extinction 44 Late Devonian 44 Fertile Crescent 44 Homo genus 44 paleoclimatic 44 Acheulian 44 atmospheric concentrations 44 #.#oC [001] 44 hominid evolution 44 Miocene Epoch 44 brutal tyrannies 44 Etruscan civilization 44 inhabitance 44 aerosol concentrations 44 mitochondrial Eve 44 Eocene Epoch 44 intensively cultivated 44 Incan civilization 44 Bronze Age 44 Tunguska Siberia 44 medieval 44 Yuan Dynasty 44 prehistory 44 seafloor sediments 44 Nazca civilization 44 CO2 concentrations 44 industrialized societies 44 Neanderthals roamed 44 Olmec civilization 44 Qin Shihuangdi 44 atmospheric CO2 44 ppm CO2 44 historical epochs 44 Braudel 44 millennia 44 Indricotherium 44 Kushite 44 Cambrian Period 44 PBDE concentrations 44 permafrost melts 44 terrestrial biosphere 44 humid tropics 44 Indus valley 44 Greek polis 44 seacoasts 44 desertified land 44 Eocene epoch 44 Olmecs 44 dwarf hippopotamuses 44 Boreal forests 44 atmospheric methane 44 Ancient civilizations 44 antiquity 44 Keeling Curve 43 ecological overshoot 43 Stabiae 43 continuously inhabited 43 Khmer Empire 43 glaciations 43 #.#C warmer 43 interglacial periods 43 Thracian civilization 43 Mesozoic Era 43 rapidly urbanising 43 yedoma 43 tropical savannas 43 prehistoric 43 Medieval Warm Period 43 Zapotecs 43 Eemian 43 Cenozoic era 43 hunter gatherer cultures 43 industrialization urbanization 43 Indo Gangetic 43 millenniums 43 temperate forests 43 Eyjafjallajokul erupted 43 agrarian societies 43 palaces temples 43 nomadic herding 43 colonialization 43 Middle Ages 43 ecoregions 43 2oC 43 glacial interglacial 43 Ancestral Puebloans 43 anthropoids 43 GHG concentrations 43 earliest hominid 43 nitrous oxide N2O 43 hunter gatherer ancestors 43 Germanic peoples 43 warm interglacial 43 faunas 43 agrarian society 43 Hellenized 43 terra preta 43 midcentury 43 aridity 43 chimps diverged 43 Caral Supe 43 Ming Dynasty #-# 43 Paleolithic Era 43 Isle Royale wolf 43 Maya civilization 43 hydrosphere 43 Khmer empire 43 Stegodon 43 Tiwanaku civilization 43 phytoplankton biomass 43 temperate zones 43 oxidized mercury 43 Amazonian forest 43 semi arid climates 43 Gondwanaland 43 Climatic Optimum 43 multifactor productivity 43 Norte Chico 43 coccolithophores 43 unfarmed 43 biodiverse ecosystems 43 Aztec empire 43 anthropogenic CO2 emissions 43 bonfires maypole dances 43 ancient Mayan civilization 42 Whitebark pines 42 Late Cretaceous 42 H. erectus 42 carceral 42 temperate latitudes 42 ancient civilizations 42 thermal inertia 42 deep convective clouds 42 ancient Celts 42 barbarian invasions 42 millennium BCE 42 pliosaur ferocious predator 42 indigenous cultures 42 Arctic icecap 42 hunters gatherers 42 atmospheric carbon dioxide 42 boll weevil infestation 42 croplands 42 subsistence 42 Akkadians 42 #mn b d 42 Sumerians 42 H. habilis 42 Castorocauda 42 Persian empires 42 Per capita consumption 42 Safavid dynasty 42 Tropical rainforests 42 salinization 42 Hellenistic 42 Great Oxidation Event 42 Mongol invasions 42 Western Han Dynasty 42 warmings 42 Woolly mammoths 42 australopithecines 42 Paleo Indian 42 Hesperian Epoch 42 urbanization 42 Laki eruption 42 multi celled 42 cultivatable land 42 ancient necropolis 42 radiative forcing 42 epochs 42 dinosaurs roamed 42 terrestrial vertebrates 42 Jevrejeva 42 civilization 42 colonial empires 42 greenhouse gas concentrations 42 gravelly sandy 42 anthropogenic greenhouse gases 42 funerary rituals 42 Sulphur dioxide 42 landmass 42 prehuman 42 twentieth century 42 Paranthropus 42 Mongol invasion 42 radiocarbon 42 ancestral Puebloan 42 nutrient deficient 42 tropical latitudes 42 semidesert 42 vestigial organs 42 Siddhartha Gautama 42 pre Incan 42 karsts 42 glaciers receded 42 Irrigated agriculture 42 paleolithic 42 Achaemenid dynasty 42 Gohar Tepe 42 climatic variability 42 centuries 42 Mesoamerican cultures 42 planet Earths 42 Kyoto Protocol obliges 42 lobe finned fish 42 Carbon dioxide concentrations 41 Roman empire 41 Cretaceous periods 41 karez 41 relict 41 Pyotr Stolypin prime minister 41 Lower Paleolithic 41 Ediacaran Period 41 Spanish Conquistadors 41 animal phyla 41 Soviet totalitarianism 41 classical antiquity 41 ancient Phoenicians 41 Argentinosaurus 41 sparsely inhabited 41 Panderichthys 41 preindustrial levels 41 Sassanids 41 millennium BC 41 Showa era 41 Arable land 41 chemosynthetic 41 paleoenvironmental 41 Ottoman rule 41 unfished 41 divine kingship 41 glacial meltwater 41 chlorophyll concentrations 41 centners 41 degraded soils 41 Yangtze basin 41 treeless plains 41 Ice Ages 41 degrees Celsius #.#F [001] 41 Noachian 41 earliest Homo sapiens 41 sea 41 Syriac Christians 41 Scott Morlock hydrologist 41 fossilization 41 Hakkas 41 Angkorian 41 Modernist architecture 41 CHD mortality 41 Avars 41 springtime ozone 41 Tang Dynasty AD 41 deglaciation 41 fifteenth century 41 pastoral nomads 41 southern supercontinent 41 colonizations 41 Han Dynasty 41 Early Cretaceous 41 Saqqaq 41 Icadyptes 41 eastern lowland gorilla 41 ramidus 41 glaciation 41 Gothic cathedrals 41 Paranthropus robustus 41 Ching Dynasty 41 Late Triassic 41 Konar Sandal 41 ecological footprints 41 precolonial 41 bristlecone pines 41 polar icecap 41 Shang Dynasty 41 thirteenth century 41 Mycenaean 41 Late Archaic 41 inhabitants 41 overexploit 41 Homo species 41 Roman Empire 41 Early Bronze Age 41 C4 grasses 41 Palaeozoic era 41 subtropical regions 41 savannah grasslands 41 Paleocene Eocene Thermal Maximum 41 Ly dynasty 41 Tertiary Period 41 Harappan civilization 41 extinct Homo erectus 41 Romans conquered 41 cerrado 41 manmade greenhouse gases 41 quadrillion gallons 41 crustal movements 41 urban agglomerations 41 carbon fluxes 41 mare nostrum 41 Indo Gangetic plain 41 tropical savannah 41 domesticating animals 41 Guge Kingdom 41 fascinated mathematicians 41 Laurentide ice sheet 41 Demographers predict 41 Haber Bosch 41 synthetic nitrogen fertilizers 41 Habsburg empire 41 Altai Mountains 41 clipper ships 41 industrialism 41 matriarchal societies 41 #.#C above 41 population densities 41 ancient civilization 41 tropical troposphere 41 locust upsurge 41 Incan empire 41 Egyptian pharaohs 41 Carthaginians 41 Phanerozoic 41 axial tilt 41 Per capita GDP 41 Crowe Cal McAffrey 41 Balhae 40 anthropogenic CO 40 Gigatonnes 40 Paleozoic Era 40 H. heidelbergensis 40 orbital eccentricity 40 orangutan populations 40 floods heatwaves droughts 40 Alpine glaciers 40 Ancestor worship 40 gracile 40 Forage availability 40 H. floresiensis 40 Mayan civilization 40 hunter gatherer populations 40 mammal lineages 40 Bristlecone pines 40 tropical savanna 40 historian Angus Maddison 40 RSV infects 40 Toba eruption 40 glacial ice 40 Neanderthals interbred 40 Egyptian Pharaohs 40 hominid fossils 40 Spanish conquerors 40 Overgrazing 40 Homo sapiens 40 Parthians 40 Mughal empire 40 hunter gatherer 40 oceans 40 meteorite bombardment 40 hutong neighborhoods 40 polar latitudes 40 eukaryote 40 Cival 40 mammal fossils 40 Quaternary Period 40 #BC [003] 40 mortuary temple 40 Sumeria 40 megafaunal 40 Late Ordovician 40 alpine glaciers 40 Homo heidelbergensis 40 ancient Khmer 40 Illyrians 40 Mesoamerica 40 fertile crescent 40 subsistence farming 40 sedimentary layers 40 author Gregg Marland 40 archeologically 40 degrees above preindustrial 40 agro ecosystems 40 Paleozoic era 40 Abbasid 40 mya 40 Hittite Empire 40 decadal 40 Irvingtonian period 40 postindustrial 40 nomadic hunter gatherer 40 marsupial mammals 40 hominin species 40 forced collectivization 40 assimilable 40 Sauropods 40 farmable 40 Sahara Desert grueling 40 Meroitic 40 Ottoman empires 40 Admonish verb dating 40 Sa Huynh 40 species extinctions 40 geological epoch 40 Sican culture 40 dustier stormier atmosphere 40 arable land 40 CO -2 emissions 40 Hahoe Village 40 Estrada Belli 40 industrialized 40 Stuttering affects 40 CO2 eq 40 subsistence agriculture 40 Cryogenian 40 ecologically unsustainable 40 Species extinction 40 placental mammal 40 Homo sapiens evolved 40 intensively farmed 40 Austro Hungarian empire 40 gigatons 40 MSC.Software employs 40 2oth century 40 anthropogenic carbon dioxide 40 Dig unearths 40 Indus Civilization 40 nitrogen deposition 40 harmful ultraviolet UV radiation 40 suburbanization 40 Frijoles Canyon 40 peopling 40 manmade CO2 emissions 40 earths surface 40 densely inhabited 40 Earth biosphere 40 Neogene 40 Chinchorro 40 draining aquifers 40 backboned animals 40 speleothems 40 resource depletion 40 Mount Vesuvius buried 40 Nabateans 40 surface temperatures SSTs 40 Qing dynasties 40 radiocarbon dates 40 tropical subtropical 40 Laetoli Tanzania 40 Roman aqueducts 40 Tang Dynasty #-# 40 sauropod dinosaur 40 abandoned hardrock mines 40 late #th/early #th 40 methane CH4 40 tyrannosaurids 40 Medieval Warming Period 40 inhabitation 40 Muziris 40 saline soils 40 Acanthostega 40 humans interbred 40 hunter gatherer societies 40 pharaonic empire 40 lowland forests 40 Younger Dryas 40 terawatts 40 Persian Empire 40 Neoproterozoic era 40 Seljuk Empire 40 chronically undernourished 40 potent greenhouse gas 40 continental crust 40 subarctic 40 inorganic mercury 40 Harappa 40 Late Paleozoic 40 ancient hominid 40 petroglyphs depicting 40 endemism 40 Edomites 39 towering icebergs 39 climatic variations 39 barbarian invaders 39 conifer forests 39 Greeks Romans 39 ancient 39 King Suryavarman II 39 anthropoid primates 39 elephants roamed 39 Great Awakenings 39 lobe finned fishes 39 Current Warm Period 39 supercontinent Pangaea 39 ancestors 39 tsarist Russia 39 ancient hominids 39 subarctic regions 39 uncultivable 39 gini coefficient 39 XIX century 39 Chauvet Cave 39 homo erectus 39 peat soils 39 Australopithecines 39 Jewish historian Josephus 39 pre Columbian 39 Hittites 39 Gobero 39 BLLs 39 anamensis 39 bony fishes 39 pharaohs 39 Byzantine Greeks 39 Late Pleistocene 39 Harappan 39 densely inhabited shard 39 latitudes 39 megastructures 39 barbarian tribes 39 Nuclear fission 39 Negev Bedouins 39 methyl chloroform 39 ancient Assyrians 39 shell midden 39 deserts jungles 39 Harvested acres 39 Chalcolithic 39 Buddhist stupas 39 archeologically rich 39 sparsely settled 39 hominin 39 civilizations 39 westward migration 39 Gangotri glacier 39 geological timescales 39 Childlessness 39 Christianized 39 biodiverse regions 39 noosphere 39 river deltas 39 Yin Ruins 39 Neanderthal bones 39 atmospheric deposition 39 Cambrian Explosion 39 troposphere 39 multicellular animals 39 Chacoan 39 multicellular organisms 39 Timucuan Indians 39 hunter gatherer lifestyle 39 ray finned 39 Tang dynasty 39 lying river deltas 39 Increasing affluence 39 Stonehenge monument 39 tumulus 39 biospheric 39 teragrams 39 medieval monastic 39 perilous voyages 39 Tuvans 39 Baptistina 39 Hapsburg Empire 39 imperial dynasties 39 Jebusites 39 human inhabitation 39 #ppm CO2 39 Jin Dynasty 39 passes Peyresourde Aspin 39 Yuan dynasty 39 basaltic rocks 39 econo mies 39 urbanized 39 Permian Triassic boundary 39 Bt cotton cultivation 39 agrarianism 39 respired 39 stegosaurs 39 Infant mortality rates 39 deforested 39 hominin fossils 39 fermented beverage 39 glacial melt 39 microcephalics 39 ancient Macedonians 39 hutongs 39 Qinghai Tibetan plateau 39 earths 39 coldest driest 39 prehispanic 39 Dietary habits 39 Three Kingdoms Period 39 Hapsburg empire 39 Nguyen Dynasty 39 vitalism 39 Homo antecessor 39 pika habitat 39 Arturo Toscano 39 Sassanid Empire 39 Homo erectus evolved 39 arable soils 39 Aztec temples 39 coarse grains 39 Lévi Strauss 39 stromatolites 39 BPH afflicts approximately 39 lowermost mantle 39 Ch'ing Dynasty 39 fearsome Tyrannosaurus rex 39 Zoque 39 modern 39 Hadean Eon 39 percapita 39 Bees pollinate 39 Tibetan Plateau 39 prehistoric cave 39 Diocletian 39 Roadless areas 39 megafauna 39 vertebrates 39 Tropical deforestation 39 Ethnic Malays 39 melting icecaps 39 infertile soils 39 ornithischians 39 Gnostic sect 39 cultivatable 39 lowland forest 39 dwarfing Jena 39 deltaic 39 nineteenth century 39 Ming dynasty #-# 39 Lapita 39 migrated northward 39 placental mammals 39 Carbon dioxide CO2 39 Parthia 39 Sassanid era 39 sea scorpion 39 fossilisation 39 Co2 emissions 39 egalitarian societies 39 eutrophic 39 Arctic tundra 39 sedimentary deposits 39 coral ecosystems 39 longships 39 grains legumes 39 Ottoman empire 39 wracked archipelago 39 shrublands 39 Sr Ca 39 Wm -2 39 sea scorpions 39 titanosaurs 39 abyssal plain 39 primitive organisms 39 planet habitability 39 predates Christianity 39 GJ#b 39 lineages diverged 39 czarist Russia 39 Karaites 39 Le Quéré 39 mod ern 39 sugars fats 39 Lohachara 39 Sui Dynasty 39 CaCO 3 39 Urinary incontinence affects 39 Genyornis 39 Archaeologists unearth 39 Taiping Rebellion 39 earliest tetrapods 39 Honeybees pollinate 39 Heian Period #-# 39 migrated westward 39 Ancestral Puebloan 39 stucco ghettos 39 Sumerian civilizations 39 glacier shrinkage 39 Saharan Desert 39 datable 39 biosphere 39 conodonts 39 ancestors migrated 39 gigaton 39 Thracians 39 Alligator gar 39 cropland pasture 39 Subsistence farming 39 disintegrations 39 Paranthropus boisei 39 Australian aborigines 39 inhabited 39 Brigham Grette 38 philosophes 38 karst landscapes 38 dinosaur genera 38 Tang dynasty #-# 38 tectonic plate movements 38 Ming emperors 38 undernourishment 38 autarky 38 civilizational ethos 38 archeologists unearthed 38 Genghis Khan conquered 38 icecap 38 methanogens 38 underwater volcanos 38 Panthera tigris sumatrae 38 farmable land 38 fellahin 38 KT boundary 38 poorest quintile 38 Assyrian empire 38 ocean acidity 38 Roman emperor Tiberius 38 pharaonic 38 Spinosaurus 38 planktonic foraminifera 38 Persians Greeks 38 reification 38 used medicinally 38 ivory flutes 38 lying deltas 38 Anthony Barnosky 38 Zhou dynasties 38 ancient Polynesians 38 cavewomen 38 socially stratified 38 Neandertal 38 Venus transits 38 Coral reefs 38 fast urbanising 38 Hesperian epoch 38 coral skeletons 38 ecoregion 38 mitochondrial DNA lineages 38 supercontinent 38 sediments deposited 38 ancient Sumerians 38 semiarid region 38 primitive 38 heritages stretching back 38 preindustrial era 38 habilis 38 Neandertals 38 kangaroo rat habitat 38 polytheistic 38 temperate regions 38 mightiest rivers 38 Puijila 38 Parma wallabies 38 Socompa 38 Qinghai Tibet plateau 38 Osteoporosis affects 38 genus Homo 38 Sawai Jai Singh 38 Ancestral Pueblo 38 Per capita income 38 terrestrial mammal 38 philosopher Immanuel Kant 38 Achaemenid era 38 Kim Carstensen WWF 38 Corinne Le Quere 38 peat swamps 38 Joseon era 38 Population Prospects 38 HNWI population 38 urbanise 38 Plate tectonics 38 elves trolls 38 strontium isotope 38 anomalously warm 38 frozen wastelands 38 dictatorship Videla 38 Chinese sage Confucius 38 Late Bronze Age 38 Chaco Canyon 38 carbondioxide 38 hominids 38 exo planet 38 Pleistocene 38 microbial ecosystems 38 Illyrian 38 Westernization 38 handicraft villages 38 exilic 38 partial skeleton 38 afforested 38 reindeer herds 38 Ming dynasty 38 Paleo Indians 38 Toltecs 38 hunted whales 38 Lupanare 38 bristlecone pine trees 38 therizinosaurs 38 Tur Abdin 38 hominid ancestors 38 Zhou Dynasty 38 Minoan Crete 38 forams 38 rapidly urbanizing 38 Efharisto Athens 38 Jamestown colony 38 photosynthetic organisms 38 ancient kingdoms 38 technological backwardness 38 Orjan Gustafsson 38 ocean basins 38 Gigantopithecus 38 polar oceans 38 capitalist societies 38 Austria Gruner Veltliner 38 Lengai 38 Dry Valleys 38 Pharaonic 38 Archaean 38 starvation overwork 38 Carboniferous 38 millets 38 unexcavated 38 Glaciers melting 38 C# atmospheric concentrations 38 glacier melt 38 radiocarbon dating 38 lain undisturbed 38 Cenozoic 38 #thcentury 38 Ilkhanid 38 Tarim River 38 Denisovan 38 cosmologies 38 Olmec culture 38 Dr. Maria Neira 38 Aurignacian 38 icesheet 38 SUBSIDIES Available 38 glaciological 38 coolings 38 multicellular creatures 38 whitebark pines 38 bird Archaeopteryx 38 Plateosaurus 38 Harvati 38 lowland plains 38 Roman Byzantine 38 ancient Mayans 38 Nabataeans 38 Ottoman Empires 38 sq.km 38 fourteenth century 38 herbivorous dinosaurs 38 multi celled organisms 38 Qin Dynasty 38 crurotarsans 38 starchy staple 38 meatless Fridays 38 Sanxingdui 38 sauropod dinosaurs 38 Oc Eo 38 Victorianism 38 seafaring 38 Cambrian explosion 38 deforesting 38 biotopes 38 Radiocarbon testing 38 Punic 38 cave dwellings 38 Turkish Ottoman empire 38 Maccabean revolt 38 ancient Hohokam 38 terra incognita 38 Çatalhöyük 38 ecologies 38 Neoproterozoic 38 Ryukyu Kingdom 38 nineteen thirties 38 Transatlantic Slave Trade 38 extinctions 38 Prototaxites 38 Indian indentured laborers 38 solar nebula 38 mn lb