Seville’s oranges are too bitter to eat fresh, but they’re a famous ingredient in marmalade—and, now, in the city’s electrical grid. The city of Seville is one of Spain’s historic hubs, primarily known for being the birthplace of flamenco, and a passionate preserver of bullfighting. But it’s also a citrus haven: With almost 50,000 orange trees, it’s Europe’s top city for orange production.Read Full Story