One significant element is dragging the world community toward the necessity of going beyond national borders and interests to work together in the face of the new challenges that it poses: the environment and its security. Today the biggest and maybe the most neglected threat to humanity, in many pundits’ eyes, is global warming. Just to mention a few, some of the most felt effects of climate change are rising sea levels, resource depletion, freshwater shortages, deforestation, biodiversity loss, and natural disasters like floods, hurricanes, droughts, and wildfires. The severity of these environmental problems has brought to the fore profound discussions on their impact on humans, states, and the world as a whole. As a result, debates over the securitization of the environment have gained prominence. This book aims to present different dimensions of environmental security and their impact on international politics. Well-known scholars from Turkey and abroad reflected on recent trends on environmental security and at the same time the environmental policies of several actors, with a special attention on Turkiye.