Textile dyes in wastewater pose serious environmental problems, but certain fungi like Penicillium species can break down turquoise blue dye through natural biological processes. Researchers isolated these fungi from polluted soil and water in Ethiopia and tested their ability to remove dye under different conditions like pH and temperature. The best-performing fungi removed up to 90% of the dye, offering a potential low-cost, environmentally friendly alternative to chemical treatment methods for treating textile industry wastewater.