Fly Ash (IMAGE) University of Sharjah Caption World production by country for different sources of fly ash, sorted by total production. Credit Separation and Purification Technology (2025). DOI: 10.1016/j.seppur.2024.129104 Usage Restrictions No restriction License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.