For more than 30 years, Alex MacLean's aerial photographs have captured the evolution of the American landscape and the complex relationship between its natural and constructed environments that contribute to climate change. Over: The American Landscape at the Tipping Point is an ambitious and visually breathtaking catalogue of the extraordinary patterns and profound physical consequences brought about by natural processes and human intervention. nbsp; nbsp; The book allows readers to visualize climate change and our culture's excessive use of resources and energy, which account for our oversized carbon footprint. It demonstrates the extent to which the human ecosystem, and our economic and social well being, are dependant upon our wise use of land and its resources. Over is divided into sections covering such as Atmosphere ; Way of Life ; Automobile Dependency ; Electricity Generation ; Deserts ; Water Use ; Sea-Level Rise ; Waste and Recycling ; and Urbanism . MacLean's powerful photographs and insightful text make it clear that maintenance of the current American lifestyle is incompatible with a planet of diminishing natural resources and a finite atmosphere. Over compels us all to reconsider our basic assumptions about how we live, work, and play, and reveals that, while the challenges we face today are not insurmountable, the future depends on our collective vision, passion, and commitment.