Workers inspect a Quantafuel pyrolysis plant in Denmark. Quantafuel, which runs this plant in Skive, Denmark, is collaborating with BASF’s ChemCycling project to turn pyrolysis oil into chemicals.

ASHLEY, Indiana—The bales, bundles and bins of plastic waste are stacked 10 feet high in a shiny new warehouse that rises from a grassy field near a town known for its bright yellow smiley-face water ...

After nearly three years of consideration, the U.S. Environmental Protection Agency is standing pat on regulation of pyrolysis operations and will continue to view them as incineration. The move buys ...