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Schematic of altitudinal gradient between Cochabamba and Amazonian Floodplain, with approximate altitudes (not to scale). (A) Urban Cochabamba, approximately 2700 masl; (B) puna (rural), approximately 4200 masl; (C) sub-puna (rural/urbanizing), approximately 3200 masl; (D) montane tropical zone (rural), approximately 2200 masl; (E) Villa Tunari (Amazon floodplain), approximately 400 masl.
