Environmental change is central to the global social policy challenges of the twenty-first century. This comprehensive Handbook brings together leading experts from around the world to address the most important questions and issues we face. How should welfare states adapt to environmental change? To what extent are the ecological and social policy agendas compatible? Must we contemplate radical reforms to the principles and organisation of welfare services? Combining cutting-edge theory and data in an interdisciplinary approach, this Handbook both summarises existing developments and suggests how debates and research must develop in the future.