Kates_2001_Science_292_641.pdf
This short paper summarizes one of the earliest international efforts to identify core research questions for sustainability science. It will give you an idea of what some people (many of whom are associated with the present book project) think a "core question" is, and a reference point against which to evaluate how things have changed over the intervening decade.
Kates_2001_Science_292_641.pdf — PDF document, 574Kb