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National Geographic : 2002 Jun
Contents
Earth's Green Crown A single ecosyste Arctic weatherfr long-vanishedgl ist Don Sullivan, acrossAlaska an Scandinaviaand and always be in sameforest." Boreal forest SExisting Under threat (from logging, mining, road building, or hydro electric development) I Deforested and degraded boreal biome Other biomes I Permanent ice cover I Tundra Temperate forest E Grassland I Desert and dry shrub Mediterranean shrub and woodland S Tropical forest ARTBYROBWOOD m rings the north, shaped by fire, _z,~~va onts, and the movements of aciers. Says boreal activ- o< "You could walk rio d Canada, ^ dSiberia, the V g U 1 nr+. 411 ARC 104w* U & S ) / Seward 7-- Peninsula CREK inks 1 C ~iQlb*~Li
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