An Historic County Embraces a Clean FutureImagine you’re out on Cornwall’s craggy coastline, salty breeze in your hair and the ghostly outlines of old tin mines dotting the horizon. St Austell, where nearly 200,000 people live and locals shell out about $13,315 a year in rent, has always been a place steeped in mining lore and china clay heritage. But here’s where it gets exciting: instead of...