In the second episode of his climate series, Ezra Klein interviews Dr. Ayana Elizabeth Johnson, a marine biologist and the founder of Ocean Collectiv and the Urban Ocean Lab, about how climate change impacts the worlds oceans and what those impacts mean for humanity. Dr. Elizabeth Johnson does a fantastic job of presenting the science of climate change and oceanography in an easily digestible fashion and clearly communicating how a changing climate will impact the lives of the millions of people who rely on the ocean for survival.