hope-for-the-planet:

Scientists find huge trove of rare metals needed for clean energy hidden inside toxic coal waste | CNN

From the article:

Scientists analyzed coal ash from power plants across the United States and found it could contain up to 11 million tons of rare earth elements — nearly eight times the amount the US has in domestic reserves — worth around $8.4 billion, according to recent research led by the University of Texas at Austin.
It offers a huge potential source of domestic rare earth elements without the need for new mining, said Bridget Scanlon, a study author and research professor at UT’s Jackson School of Geosciences. “This really exemplifies the ‘trash to treasure’ mantra,” she said. “We’re basically trying to close the cycle and use waste and recover resources in the waste.”