After discovering the orange rivers in a former coal town poisoned by iron oxide, one artist has an unorthodox idea: to extract the chemical and transform it into pigment for paint. 　　John Sabraw is a renowned artist who goes caving in waders to extract pollution from rivers and turn chemicals into pigments in a former coal town. Not only does he create artworks exploding with colour, he's building a multi-million dollar, carbon-neutral factory that will expand this process to create paint for industrial use, restoring miles of waterways and cutting carbon in one stroke. 　　源自：https://hotdocs.ca/whats-on/hot-docs-festival/films/2023/beautiful-poison