CleanTechnica: You would never expect the peaceful Lehigh Valley to be hosting a high-tech superstar of the 21st century. However, the areas coal mines and steel plants ushered in the American Industrial Revolution. Philadelphia and New York lie within a 100-mile radius, and the sub-Appalachian hills are the fastest-growing region in Pennsylvania.
CleanTechnica reporters in the valley found that it also houses many light planes and a small airport designated international only a year ago. On weekends and...