Concerns associated with biological diversity and the extinction of species are addressed in this report. Major topic areas examined include: (1) historical records of extinctions; (2) conservation biology and tropical ecology; (3) human-management regeneration potentials; (4) restoration ecology; (5) experimental restoration efforts; (6) governmental programs and policies; (7) global environmental priorities; and (8) the need for environmental sustainability. Bibliographic notes are also provided. (ML)