Climate change is real, and extreme weather events are its physical manifestations. These extreme events affect how we live and work in cities, and subsequently the way we design, plan, and govern them. Taking action 'for the environment' is not only a moral imperative; instead, it is activated by our everyday experience in the city. Based on the author's site visits and interviews in Darwin (Australia), Tulsa (Oklahoma), Cleveland (Ohio), and Cape Town (South Africa), this book tells the story of how cities can lead a transformative pro-environment politics. National governments often fail to make binding agreements that bring about radical actions for the environment. This book shows how cities, as local sites of mobilizing a collective, political agenda, can be frontiers for activating the kind of environmental politics that appreciates the role of 'nature' in the everyday functioning of our urban life.