Related by context. Frequent words. (Click for all words.) 65 Yangtze River basin 56 heavily polluted 54 biodiversity hotspot 54 Three Gorges Reservoir 53 Poyang Lake 53 glacial melt 53 Qinghai Tibet Plateau 52 Soil erosion 52 Omo River 52 Xijiang River 52 Alaskan coastline 51 lowland forest 51 driest inhabited continent 51 coastland 51 #sq km [001] 51 nesting seabirds 51 freshwater habitats 51 deltaic 51 frequent droughts 51 drylands 50 subtropical regions 50 Devastating floods 50 river Brahmaputra 50 peat swamps 50 Huaihe River 50 Yangtze River 50 Fujian Xinhua 50 Taihu Lake 50 Yangtze river 50 sq. mi 49 temperate forests 49 Lake Natron 49 river deltas 49 biodiversity hotspots 49 Songhua river 49 Yunnan Guizhou 49 Brahmaputra River 49 biologically diverse 49 salination 49 Boreal forest 49 Wadden Sea 49 temperate rainforest 49 Dongting Lake 49 coral formations 49 Melting glaciers 48 arid regions 48 deciduous forests 48 Ogallala aquifer 48 Three Gorges dam 48 Entire towns 48 inter tidal 48 Large swathes 48 sqkm 48 sq.km 48 coral reefs 48 mudflat 48 Murrumbidgee River 48 Great Dividing Range 48 Densely populated 48 #sq km [003] 48 arable farmland 48 Svalbard archipelago 48 groundwater depletion 48 Cyclone Aila 48 sq km 48 Tibetan plateau 47 mangrove forests 47 Fuding 47 reedbeds 47 Severn estuary 47 sq. kms 47 retreating glaciers 47 coniferous forests 47 montane 47 worsening droughts 47 biodiverse 47 Sutlej river 47 Indonesia sprawling archipelago 47 #km# [004] 47 lowland forests 47 gully erosion 47 Amazonian rainforest 47 #km# [002] 47 Three Gorges reservoir 47 river basin 47 sparsely inhabited 47 Shaanxi provinces 47 Rapid urbanization 47 Severn Estuary 47 ecologically fragile 47 Tibetan Plateau 47 biosphere reserves 47 forested wetlands 47 Mithi river 46 driest continent 46 ecological degradation 46 Mau forest 46 arid lands 46 Sundarbans 46 Lake Turkana 46 semi arid