Ecological engineering method is a process of designing and improving human systems in a way that aligns with the principles of ecology. Some synonyms for ecological engineering method include ecological design, sustainable engineering, green engineering, eco-engineering, and environmental engineering. Ecological design focuses on creating human-made environments that work in harmony with nature, while sustainable engineering emphasizes the use of renewable resources and low-impact practices. Green engineering uses technology to reduce the negative impact of human activities on the environment, while eco-engineering combines ecological principles with engineering to create environmentally-friendly solutions. Environmental engineering is the branch of engineering concerned with protecting the natural environment and public health by reducing the impact of human activity on the environment.