Beyond prices at peak oil: $20 per gallon

SUV plants shut down, the airline industry collapses, public transportation is revitalized and farms go local as gas prices skyrocket, predicts Forbes writer Christopher Steiner in a new book.

What will the world look like as the price of gasoline climbs, $2 at a time, from $4 to $20 a gallon?

Christopher Steiner, a staff writer at Forbes magazine, takes a look at how the future of energy is going to change, with his new book,

The book is expected to make the New York Times non-fiction hardcover extended bestseller list, to be published Aug. 16.

But cleantech experts may or may not agree with some of his contrarian speculations and conclusions, namely that hydropower, solar, wind, geothermal and natural gas don