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This report contains an outline for a strategic planning exercise on global problem, specifically climate change in relation to population growth, energy and food supply. First, a theoretical introduction is given on the nature of so-called policy exercises and decisionmaking on international environmental problems. Then, the partially finished version of the world 4.0 simulation model and a first set-up of the strategic planning exercise are discussed. The report is a pilot study, partly financed by the Dutch National Research Program on Air Pollution and Climate change.