Ключевые слова: aerial view, circular, city, clean water, drone shot, ecology, engineering, environment, environmental protection, filtration, grass, green, industrial, infrastructure, innovation, landscape, modern, nature, plant, pollution control, purification, recycling, resource management, round, sanitation, sewage treatment, sustainability, sustainable development, tank, technology, top view, treatment, urban, waste management, wastewater, wastewater treatment plant, water, water management, water purification, water resource, water supply,