American Institute of Physics: Over the next few days Physics Today contributing editor Jennifer Oullette will be blogging the Industrial Physics Forum from Seattle, Washington. This year's forum, appropriately enough after last week's Nobel Peace prize award to Al Gore and the IPCC, is devoted to the energy challenge of reducing mankind's carbon dioxide emissions. MIT's Mildred Dresselhaus gave an introductory talk that called for "a Moore's Law" for energy efficiency, e.g. dramatic improvements in energy efficiency every 18 months. In one of her first postings, Oullette looks at the energy costs of transportation, and what manufacturers will have to build to wean consumers away from the gasoline engine.