Related by context. Frequent words. (Click for all words.) 47 deforestation 45 Deforestation 40 tropical forest 40 Desertification 40 Meteorological 40 Protected Areas 39 Environment Programme 39 Amazon rainforest 38 Biodiversity 38 Earth Observation 37 Space 37 Ibama 37 tropical forests 37 Urbanization 36 Volcanology 36 tropical rainforests 36 biodiversity 36 Amazonia 36 UNEP 36 Space Agency 35 ECLAC 35 forests 35 Climate Change 35 Climate 35 desertification 34 Earth Object 34 marine biodiversity 34 ocean ecosystems 34 Climate Change Secretariat 34 Agriculture Organization 34 overexploitation 34 Nasa 34 ozone depletion 34 forest ecosystems 34 tropical rainforest 33 NASA 33 Forests 33 Environment Programme UNEP 33 rainforests 33 Imagery 33 Isro 32 rainforest 32 Agriculture Organization FAO 32 orbital debris 32 Astrobiology 32 Amazon basin 32 mangrove forests 32 anthropogenic 32 Roskosmos 32 WWF 31 Nature WWF 31 Climate Change IPCC 31 Goddard Space Flight 31 reforestation 31 NASA Ames 31 carbon sinks 31 climate change 31 Roscosmos 31 biodiversity conservation 30 ozone depleting substances 30 forestation 30 Agriculture Organisation FAO 30 JAXA 30 greenhouse gas concentrations 30 ocean acidification 30 extinctions 30 Jet Propulsion Laboratory 30 forest 30 environmental degradation 30 mountain glaciers 30 boreal forest 30 bio diversity 30 deforested 30 FAO 30 boreal 30 melting glaciers 29 greenhouse warming 29 Planetary Society 29 livestock grazing 29 Astronomy 29 UNFCCC 29 greenhouse gases 29 global warming 29 arid regions 29 coca cultivation 29 reforest 29 Aeronautics 29 forest fires 29 heat trapping gases 29 ecosystems 28 peatlands 28 Propulsion 28 afforestation 28 Agriculture Organisation 28 REDD 28 atmospheric carbon dioxide 28 peatland 28 Coral Triangle 28 greenhouse gases emitted 28 Ecotourism 27 urbanization