This comprehensive book delves into the cutting-edge topics of phytoremediation and phycoremediation, focusing on the genetic engineering of plants and algae to enhance their pollutant-removal capabilities. The authors confront the challenges of implementing these techniques while offering insights into potential solutions. Highlighting recent case studies of successful projects, the book showcases practical applications in real-world settings, illustrating the effectiveness of these methods in restoring contaminated environments. Additionally, the book discusses future directions in the field, emphasizing how emerging technologies and techniques are poised to shape its evolution. "New Horizons in Phytoremediation and Phycoremediation" serves as an essential resource for researchers, practitioners, and students in environmental science, biology, and bioengineering. It offers a hopeful perspective on ecosystem restoration and plays a critical role in addressing the pressing issue of environmental pollution.