> See, in general, http://green.venturebeat.com/2008/04/11/why-the-california-h.. http://green.venturebeat.com/2008/04/11/why-the-california-h.... Too much hot

> See, in general, http://green.venturebeat.com/2008/04/11/why-the-california-h.. http://green.venturebeat.com/2008/04/11/why-the-california-h.... Too much hot air. How about some real numbers from historical data? From "Sustainable Energy - without the hot air" by David McKay, p.121. http://www.inference.phy.cam.ac.uk/mackay/Books.html http://www.inference.phy.cam.ac.uk/mackay/Books.html Energy consumption (kWh per 100 p-km) ------------------ Car 68 Bus 19 Rail 6 Air 51 Sea 57 ------------------ Table 20.8. Overall transport efficiencies of transport modes in Japan (1999).