The Vision California modeling exercise, however meticulous in its calculation methods, still relies on a slate of assumptions that call for some vigilant critiques. Calthorpe & Associates, which devised Vision California based on previous work, have stated elsewhere that the key to the global warming crisis lies in curbing "sprawl," that pejorative term for low-density suburban development. To the extent that a large lot, single-family home with a multi-car garage represents a choice, it is in Calthorpe's view neither a preferable nor sustainable one.
