 Welcome back to Outlook. I'm Asya Fuchs. Now, for my last guest, Doreen, the sea was a refuge, a place of mystery and wonder. It was the same for environmental scientist Crystal Ambrose, who grew up loving the ocean. So when she saw the impact of plastic pollution on the water near her home, she decided right then to do something about it. In 2020, together with a group of schoolchildren in the Bahamas, she persuaded their government to ban single-use plastics.