The End of Surburbia

What's the documentary's main claim?

Since World War II North Americans have invested much of their newfound wealth in suburbia. As the population of suburban sprawl has exploded in the past 50 years, so too has the suburban way of life become embedded in the American consciousness.
But as we enter the 21st century, serious questions are beginning to emerge about the sustainability of this way of life. The End of Suburbia explores the American Way of Life and its prospects as the planet approaches a critical era, as global demand for fossil fuels begins to outstrip supply. World Oil Peak and the inevitable decline of fossil fuels are upon us now, some scientists and policy makers argue in this documentary.