In the News Focus Story, "Greening the Meeting" (5 October 2007, P. 36), B. Lester compares the fossil fuel energy required to transport scientists to and from a conference by airplane to the energy used by "2250 Honda Civics during a year's worth of normal driving." Another way to put a human face on fossil energy usage is to think in terms of "Virtual Persons" (VPs). (Letters)