ocr: Subsequently, the need or establishment of environmentall base- Table 1: Lakes Studed(Continued) lineshas receredattentionatthe 1972United_NationsConferenoe onthe HumanEnvironmentandfollow-up effortsto implementa Global Envizonmental Montoringsystem(NAS 1976). QUE Table 1: Lakes Studied H Balkash Asia 7,115 85 Ladoga Europe 6,835 738 E lE Chad Africa 6,300 24 Maracaibo South: America: 5,217: 115: Acia-Europe 143244 3,363 Onega Europe 3,710 328 Eyre Australia 3,600 4 North Ameria 31,700 1,330 Volta Africa 3,276 Titicaca: South: America: 3,200 922: Huron North 4merica 23,000 750 Nicaragua North ...