Scenarios are plausible, challenging, and relevant stories about how the future might unfold, which can be told in both words and numbers. Scenarios are not forecasts, projections, predictions, or recommendations. They are about envisioning future pathways and accounting for critical uncertainties. The process of building scenarios is about asking questions as well as providing answers and guidance for action. It is intended to widen perspectives and illuminate key issues that might otherwise be missed or dismissed. By offering insight into uncertainties and the consequences of current and possible future actions, scenarios support more informed and rational decisionmaking. Scenarios address real-world questions of systems dynamics, policy choices, technological evolution, and consumption and production patterns. They reflect the modern worldview that the future is not preordained but rather is subject to human actions and choices. Yet the age-old drive to ponde
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