1. Vertical Farms: These structures would be integrated within the urban landscape, allowing for the efficient use of vertical space and reduced transportation costs for locally-grown produce. This would not only minimize the city's environmental footprint but also promote self-sufficiency.

2. Renewable Energy Sources: The city would be powered by solar and wind energy, with solar panels and wind turbines integrated into the buildings' designs. Additionally, buildings could feature energy-saving technologies like smart windows and automated lighting systems to reduce energy consumption.

3. Green Transportation: Encouraging the use of electric vehicles, bicycles, and walking, the city would have dedicated bicycle lanes, pedestrian paths and a well-connected public transportation system, significantly reducing greenhouse gas emissions and traffic congestion.
Imagine you are an architect designing a futuristic city. Elaborate three innovative and sustainable features you would incorporate into the city's design.