When Iona Macdonald graduated from Aberdeen University in 2000 with a degree in chemistry, there was only one show in town. Iona recalls that she "inevitably slid into the oil and gas industry" where, like thousands of others, she built a successful and lucrative career. Back then, the sector was swimming in money, she remembers. "You would see a lot of Ferraris and Lamborghinis," says Macdonald of Aberdeen at the time. But after a quarter of a century, that journey - working both on and