a futuristic city with skyscrapers featuring green rooftop gardens and eco-friendly architecture, surrounding a lush central park

futuristic sustainable city green rooftop gardens wind turbines renewable energy eco-friendly urban skyscrapers smart design architecture metropolis environment innovation development infrastructure high-rise clean future vegetation planning technology cityscape eco-city skyline modern sustainable-living smart-city public-space greenery efficiency nature sustainable-urban smart-planning future-city urban-landscape renewable-energy sustainability buildings eco-friendly-design