Author Archives: Vaughan Pratt

The US Environmental Protection Agency (EPA) has estimated the combined city/highway miles-per-gallon-equivalent (MPGe) of the Toyota Mirai at 67 MPGe, and the range of its 5 kg tank as 312 miles.  Since neither of these numbers are terribly useful without … Continue reading →

California awards Zero Emission Vehicles or ZEVs its coveted white sticker, entitling its solo driver to drive in the high-occupancy-vehicle (HOV) or carpool lane.  The state’s rationale is that CO2-emitting vehicles are contributing to a gradual rise in temperature over … Continue reading →

Joe Romm has been arguing that fuel cell vehicles are a lost cause since even before he published his 2004 book The Hype about Hydrogen. On April 8, 2015 he published Tesla Trumps Toyota: The Seven Reasons Hydrogen Fuel Cell … Continue reading →

Tony Seba is a Stanford MBA with a BS in Computer Science from MIT currently residing in Northern California.  Quoting from his blog http://tonyseba.com, “Tony Seba is the author of Clean Disruption of Energy and Transportation, Solar Trillions and Winners … Continue reading →

On Thursday (5/19/16) I leased a Mirai from Toyota Sunnyvale (nearest Mirai dealer to my Palo Alto home). Why Mirai? 1. ICEs emit many kinds of carcinogens into my neighborhood, see the book The Harmful Effects of Vehicle Exhaust described … Continue reading →

I started this blog for the purpose of collecting and evaluating opinions about the future roles hydrogen might play in the global energy economy. Basics first. Energy density Hydrogen is one of a number of forms in which energy can … Continue reading →