Futuristic city

Hello I had to design a futuristic city for a school project and decided to upload it here. it is a very large file and hard to run, but eventually i got it done. My reasoning follows below.

In the future humans will still be coping with some of today’s mistakes. They will live in houses and apartments but will be 100% ecofriendly. Each house would be 99% self-sustainable and produce its own food from the circular greenhouses, electricity from solar panels, and water from machines that extract the humidity from the air. Since people would need to get around they would use drone cars that powered from solar energy, and wind energy. The big sphere in the center would provide the food and/or water for citizens whose machines failed, or for people coming over and their hotels can’t provide. 35% of the world (not including oceans) would be kept for the animals to flourish. Most of the sea would be too. People would travel through giant drones that are self-sustainable. Minerals would be