Subtitles section Play video Print subtitles After a coal mine shuts down, the pollution doesn't stop toxic waste flows for decades contaminating rivers and killing aquatic life. Now, a team has developed a method to harvest the muck and turn it into paint. The team drives the pigment before shipping it off to a giant kiln. They changed the color by controlling the temperature. For now, true pigments can't harvest enough iron oxide to clean up an entire stream. These mines will continue producing a. M. D. For hundreds of years, but Michelle is confident that turning pollution into art can make a difference.