What is the umbrella-shaped space city like?

Dr. O 'Neill, a physics professor at Princeton University, has been studying and building a space city for a long time. 1977, he published the book Space Immigrant Island, and put forward three design schemes of space island, among which "O 'Neill Island III" is an umbrella-shaped space city. Like an open umbrella. The umbrella handle is two huge cylinders. This umbrella is very big. The umbrella handle alone is 6500 meters thick and 3200 meters long. In this vat, more than 654.38+0 million people can live. The two umbrella handles are connected by a transmission belt and rotate at the speed of one revolution per minute, thus generating artificial power. The umbrella handle is surrounded by glass windows, and the windows are covered with baffles. The cover plate is inlaid with large glass. When the cover is closed, it is night inside. When the cover plate is opened, the mirror refracts sunlight from the outside to the inside, and the inside is daytime.

Inside the cylinder is a real city, with mountains, trees, flowers, rivers, stadiums, cinemas, hotels, airports, stations and docks. As on the earth, the residents of the Space City can go out to do business by boat, bus or plane, or simply wave their hands and take a taxi, which is very convenient. What is particularly amazing is that this space city can also carry out artificial rainfall, including sunny, cloudy, rainy and cold and warm changes. Scientists designed the edge of the umbrella stand as an agricultural hut. In the agricultural cabin, you can create spring, summer, autumn and winter in different cabins through temperature control. Therefore, the agricultural cabin is full of grains, fruits and vegetables. Because of the right temperature and humidity, there are herds of cattle, pigs and sheep in a whole circle, birds singing and beneficial insects flying. This is the whole world. Citizens living in Space City can eat fresh vegetables, fruits and food all year round.

Because the environment in the space city is very superior, we breathe fresh air, and we no longer have to worry about air pollution in cities around the world. Superior environment and advanced planting methods, where can we eat green food?