Related by context. Frequent words. (Click for all words.) 56 landmass 55 ecological footprint 53 gigatonnes 53 arable land 52 Global Footprint 52 drylands 52 biodiversity hotspots 51 GDPs 50 mammal species 50 km ² 49 per capita 49 Per capita income 49 Nominal GDP 49 vertebrate species 49 Gross Domestic Product 49 biodiverse 48 Statistical Review 48 GDP 48 earths 48 technically recoverable 48 nominal GDP 48 preindustrial 47 biosphere 47 greenhouse gases GHG 47 biologically diverse 47 mbd 47 degrees Fahrenheit warmer 47 tropical rainforests 46 gdp 46 atmospheric methane 46 boreal 46 Index HDI 46 extractable 46 radiative forcing 46 sq.km 46 CO2 concentrations 46 gigatons 46 nonrenewable resources 46 biome 45 sq kms 45 interglacial period 45 atmospheric CO2 45 cyclically adjusted 45 Gini coefficient 45 biodiversity 45 archipelagic 44 Per capita 44 mb d 44 largest emitter 44 megatonnes 44 Carbon dioxide emissions 44 atmospheric CO 44 cultivable 44 World Factbook 44 economically recoverable 44 CO2 emitted 43 temperate zones 43 Phytoplankton 43 boreal forests 43 preindustrial levels 43 sq km 43 terrestrial ecosystems 43 exabytes 43 #/#th [001] 43 driest continent 43 glacial melt 43 tropical rainforest 43 carbon emitter 43 maternal mortality ratio 43 IUCN Red 42 GHG emission 42 anthropogenic 42 coral reef ecosystems 42 #GW [002] 42 ecosystems 42 BOP surplus 42 mbpd 42 subtropical regions 42 atmospheric carbon dioxide 42 chronically hungry 42 mountain glaciers 42 cultivable land 42 GHGs 42 hydrocarbon reserves 42 amphibian species 42 estimated metallurgical recoveries 42 tropical forests 42 #sq km [003] 42 carbon sinks 42 arid regions 42 population 42 #km# [004] 41 trillion bytes 41 #.#C [004] 41 oceans 41 ecological degradation 41 sq. kilometers 41 decadal 41 industrialized countries 41 species extinctions 41 nitrous oxide emissions