Richard Vevers was an advertising executive in London with a passion for diving. Then, he witnessed the dramatic effects of coral bleaching at Bali's Airport Reef. Shocked by what he saw, Vevers became an advocate for ocean conservation. You can see him in the new Netflix docu0mentary, Chasing Coral. Nexus Media spoke with Vevers about what climate change is doing to coral reefs and what we can do to stop it. This interview has been edited for length and clarity.