Think of it as the "Endless Summer" for the green set.
Swiss teacher Louis Palmer is nearing the completion of his round-the-world trip in a solar-powered vehicle. Palmer arrived at the UN Climate Change conference in Poznan, Poland last week in his solar taxi. The two-seat trike has completed 32,365 miles over the 17-month trek, running mostly on solar energy collected through a trailer covered in photovoltaic cells. Unfortunately, clouds limit the amount of energy that can be collected from the sun at times, so Palmer has had to plug in the taxi n