This document discusses using microalgae to address issues of sustainable development and environmental management. It summarizes current problems with water resource management, eutrophication, and algal blooms negatively impacting lakes and other bodies of water. It then proposes using microalgae cultivation and biomass in wastewater treatment, biofuel production, and other applications to help restore water quality, produce resources, and mitigate climate change in a sustainable manner. The document outlines how microalgae could serve as a key tool for new designs addressing these issues through biological systems.