Imperiled Ocean is an exploration of the earth's last wild frontier, filled with high-stakes stories that explore a vast territory undergoing tremendous change. Journalist Laura Trethewey set out in 2015 on 'an extended listening tour' to hear some of these stories. She learned that for reasons of money… migrants die, cruise ships steer around the law, and plastic is made, sold and discarded faster than it can be collected and disposed of.