Charles Goddard, editorial director at Economist Impact speaks to Pascal Lamy, president of the Paris Peace Forum, and Naoko Ishii, director at the Centre for the Global Commons at University of Tokyo, about marine chemical pollution in a broader context.  Is chemical pollution a key anthropogenic challenge on a par with climate change and biodiversity loss? Why do we need to include chemical pollution as a broad set of global environmental challenges? Are we already at a tipping point?  Relevant content:  More Back to Blue podcastsReport | The Invisible Wave: Getting to zero chemical pollution in the oceanData story | Chemicals and our oceans: A gathering crisisVideo | The Invisible WaveBack to Blue is an initiative of Economist Impact and The Nippon Foundation.