Eco-friendly stadium, recycled plastic seats, FSC-certified wooden bleachers, low-carbon concrete structures, energy-efficient LED lighting, solar panels, wind turbines, green roofs, rainwater harvesting systems, permeable pavement, natural ventilation systems, high-performance insulation, sustainable landscaping, native plant species, minimized waste management, optimized material sourcing, Cradle-to-Cradle design approach, circular economy principles.