The essays deal with policy issues relating to environment governance in a situation where relevant scientific knowledge is uncertain and contextual. Recent debates in the context include climate change, genetically modified foods, and sustainable development. When stakes are high and decisions are urgent, new approaches are required for knowledge production and policy making.Divided into five parts, the volume features: I. methodological perspectives; II. GMO policies covering bio-safety laws; III. climate change policy; IV. energy policy: nuclear waste, corporate energy strategies; V. sustainable development: assessment tools, S&T Policymaking, and water governance.