Ecocities is about re-building cities and towns based on ecological principles for the long term sustainability, cultural vitality and health of the Earth's biosphere. Unique in the literature is the book's insight that the form of the city really matters - and that it is within our ability to change it, and crucial that we do. The book describes the place of the city in evolution, nature and history. It pays special attention to the key question of accessibility and transportation, and outlines design principles for the ecocity, and then outlines the tools by which a gradual transition to the ecocity could be accomplished.