Related by context. Frequent words. (Click for all words.) 65 biodiversity 65 tropical forests 63 desertification 63 rainforests 62 environmental degradation 61 soil erosion 59 climate change 59 forests 59 reforestation 57 global warming 57 rainforest 57 REDD 53 forest 51 greenhouse gas emissions 51 overfishing 50 greenhouse gases 49 carbon emission 49 urbanization 48 greenhouse emissions 48 carbon emissions 48 indigenous peoples 47 logging 47 Biodiversity 47 carbon sequestration 46 greenhouse gas emission 46 plantations 46 forest fires 46 arable land 46 palm oil 46 pollution 45 greenhouse gas 45 depletion 45 carbon dioxide emissions 45 forestland 45 coral reefs 45 ecosystems 45 malaria 45 Forests 44 urban sprawl 44 malnutrition 44 forestry 44 maternal mortality 44 heat trapping gases 44 extreme poverty 44 UNEP 44 habitat 44 acid rain 44 forested 44 loggers 43 felling 43 poaching 43 Climate Change 43 WWF 43 mangroves 43 CO2 emissions 43 Agriculture Organization 43 degradation 42 overpopulation 42 FAO 42 cropland 42 fossil fuels 42 droughts 42 Global warming 42 climatic 42 mangrove 42 planting trees 42 poorer nations 42 poachers 42 vegetation 42 Kyoto Protocol 42 conservation 41 UNFCCC 41 crop yields 41 Climate Change IPCC 41 habitats 41 burning fossil fuels 41 carbon dioxide 41 coca 41 emissions 41 glaciers 41 sugarcane 41 emission reductions 41 fossil fuel 41 Climate 41 conservationists 41 ecological 41 extrajudicial killings 40 ecotourism 40 replanting 40 GHG emissions 40 commercial whaling 40 encroachment 40 tree planting 40 invasive species 40 grasslands 40 maternal deaths 40 carbon 40 industrialization 40 carbon dioxide CO2 40 extinction 40 poverty alleviation