Related by context. Frequent words. (Click for all words.) 43 biodiversity 42 hydrological 42 desertification 40 carbon sequestration 40 UN HABITAT 39 Environment Programme UNEP 39 hydrology 39 scientific 39 Lomborg 39 Environment Programme 39 hydrologic 39 anthropogenic global warming 39 anthropogenic 39 afforestation 38 river basin 38 UNEP 38 peatland 38 groundwater recharge 38 biodiversity conservation 37 empirical 37 ecological 37 climatological 37 climate change 37 REDD + 36 global warming 36 Desertification 36 deforestation 36 carbon sinks 36 IPCC 36 geoengineering 36 Program UNEP 36 hydrologists 36 transboundary 35 soil erosion 35 freshwater 35 coastal erosion 35 ecosystems 35 Environment Agency 35 IUCN 35 UN Intergovernmental Panel 35 decadal 35 peer reviewed literature 35 AGW 35 World Meteorological Organization 35 manmade global warming 35 bio diversity 34 climatologists 34 George Monbiot 34 marine biodiversity 34 climatology 34 Biodiversity 34 Global Warming 34 UNFCCC 34 atmospheric CO2 34 ECLAC 34 conservation 34 Climate Change IPCC 34 NIWA 34 IPPC 33 wetland restoration 33 aquifers 33 UNEP Executive 33 semi arid 33 Watersheds 33 peer reviewed 33 Intergovernmental Panel 33 journal Nature Geoscience 33 mountain glaciers 33 nutrient pollution 33 WMO 33 World Meteorological Organisation 33 Climate Change 33 overexploitation 33 ecology 33 archeological 33 paleontological 32 environmental 32 geologic 32 mangrove forests 32 soil fertility 32 IPY 32 Defra 32 coastal ecosystems 32 geotechnical 32 coral reefs 32 environmental degradation 32 ozone layer 32 trans boundary 32 arid regions 32 Nature Geoscience 32 CO2 32 WEO 32 CPCB 32 aquatic ecosystems 32 wetland 32 marine ecosystems 32 silting 32 priori 31 Amazon rainforest 31 greenhouse warming 31 geological