The conditions may finally be right for deep sea mining. Demand for rare minerals is peaking thanks to consumer electronics, and technology has developed enough that drilling three miles underwater can be done safely. Or can it? This week on Parts Per Billion, Bloomberg Environment's Adam Allington tells us about why some environmentalists and scientists think mining isn't actually better down where it's wetter. Host: David Schultz Editors: Marissa Horn & Nicholas Anzalotta-Kynoch Producers: Rachael Daigle & Jessica Coomes