Summary: As plastic waste piles up in the world's landfills, sewer systems and oceans, the United Nations has set a goal to reduce plastic pollution by 80 percent by the year 2040. Inger Andersen, head of the United Nations Environment Programme, joins William Brangham to discuss the upcoming negotiations over how to realize this goal. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
