Related by context. Frequent words. (Click for all words.) 47 fragile ecology 47 wildernesses 47 biologically diverse 45 ecologically fragile 45 ecologically sensitive areas 45 vast swaths 44 pristine wilderness 43 nonrenewable resources 43 landmass 43 despoiling 42 mineral 42 seabed 42 square kilometer 42 undeveloped 41 sq. miles 41 Arctic seabed 41 despoil 41 gasfields 41 despoiled 41 sq. km 40 exploration tenements 40 peat bogs 40 uninhabited 40 geological formations 40 sq. kilometers 40 mineral extraction 39 finite resource 39 forests 39 barrens 39 biodiverse 39 palm plantations 39 methane hydrate 38 sqkm 38 sedimentary basins 38 sq km 38 #km# [004] 38 shale deposits 38 sq.km 38 icecap 38 alluvial deposits 38 virgin forests 38 land 38 coalbed methane 38 Large swaths 38 tar sands 38 fossil fuel 38 archipelagos 37 fertile farmland 37 Lomonosov Ridge 37 sparsely settled 37 forestland 37 subsoil 37 pollute 37 reforesting 37 aquifers 37 peat bog 37 vast tracts 37 contaminating groundwater 37 Arctic archipelago 37 watersheds 37 polluted waterways 37 Spratly Islands 37 volcanic islands 37 freshwater wetlands 37 polluted 37 archeological sites 37 unspoiled 37 Seabed 37 evaporation ponds 36 economically recoverable 36 sparsely inhabited 36 contiguous 36 arable land 36 archaeological finds 36 islands 36 properties 36 reforested 36 hectare parcel 36 mined 36 landholdings 36 Large swathes 36 methane hydrates 36 environmentally sensitive 36 peat 36 cultural patrimony 36 fossil fuels 36 industrialize 35 marine sediments 35 Arctic Ocean 35 vast expanses 35 precious 35 forested 35 Amazon rainforest 35 clearcuts 35 archaeological sites 35 property 35 ancestral lands 35 peatland 35 bituminous coal 35 lands 35 hardwood forests