'This marvellous volume sets out how a transition to a hydrogen economy might come about. It will surely do much to hasten its arrival!' Professor Peter Edwards, University of Oxford, UK'This book brings a much needed critical perspective to the hydrogen debate. Unlike much of the hype around the 'hydrogen economy', the authors don't assume hydrogen is the answer - but ask what would be required for it to have a significant impact.' Jim Watson, Director, Sussex Energy Group and Co-leader, Tyndall Centre Climate and Energy Programme, University of Sussex, UK'How - and whether - hydrogen might contribute to a sustainable energy economy is one of the great imponderables of energy policy. The outcome depends on improving technological performance, lowering costs, gaining public acceptance and above all engineering systemic change. Don't look to this book - or any other book - for a prediction of the future. But if you want this complex problem untangled look no further. This book will tell you all you need to know about what we don't know.' Professor Jim Skea, Research Director, UK Energy Research Centre'From the Editor of Nature to the presenter of Top Gear, all believe that hydrogen as a widely used, secure and sustainable energy carrier is essential and inevitable. But hard challenges abound: this marvellous volume sets out how a transition to a hydrogen economy might come about. It will surely do much to hasten its arrival!' Professor Peter Edwards, University of Oxford, UK