How much pollution is a coke plant owned by William Koch pumping into the air?

Pollution from a coke plant in Port Arthur, Texas, which is owned by William Koch, may be higher than indicated by the data.

The non-profit news organization Grist used court records and data to reveal what has been happening at the plant. Here & Now's Scott Tong talks with Naveena Sadasivum, a senior staff writer for Grist who covered the story.