For Labor Day, we have a special show with reprisals all focused on the theme of transportation — including getting around on foot. Thor Pedersen, a former UN soldier originally from Denmark, went on a decadelong adventure that took him to every country in the world. He never took an airplane. Also, research shows that flight turbulence has increased as climate change has warmed the planet. One researcher explains that the increase in bumpy flights could be caused by changes in wind speed at high altitudes due to warmer air from carbon emissions. And, lithium is in soaring global demand, because it’s used in electric car batteries. This is good news for the economy of Chile, which meets a third of the world’s lithium needs. Experts say there's a big financial opportunity for the region, but it comes at an environmental cost.