"At present, there are roughly a billion cars in the world. Yet within twenty years, the number will double to 2 billion ... Given that greenhouse gases are already creating havoc with our climate and that violent conflict in unstable oil-rich nations is on the rise, does this mean that matters will only get worse, or are there hopeful signs that effective, realistic solutions can be found? ... Daniel Sperling and Deborah Gordon explain how we arrived at this state, and what we can do about it." (Quoted from product description)