Energy-efficient hospital building, green roofs, solar panels, natural ventilation systems, double-glazed windows, insulation materials, recycled concrete structures, airy atriums, open floor plans, calming interior colors, soft diffused lighting, gentle water features, serene courtyards, lush greenery, vibrant flowers, outdoor seating areas, walking trails, scenic views, healing gardens, minimalist design, modern architecture, sustainable building materials, low-carbon emissions, eco-friendly systems, realistic textures, ambient occlusion.