Climate change and its impact on water resources in agriculture pose one of the biggest challenges for food, energy, fiber, and water security worldwide and, as a consequence, for society. This book presents a multidisciplinary approach towards climate change and water resources in agriculture and provides a comprehensive perspective about the core points central to this subject. Other topics that are covered in this book include important insights concerning hydrological cycle, forests, land use change and water, low carbon agriculture, green economy concepts, as well as the state of the art on United Nations Framework Convention on Climate Change and Global Research Alliance are provided.