Prompt: In the future, the continents of the Earth changed from forests to deserts.Part of humanity will stay on the already desertified earth, and the other part will go to the universe to find a new shelter.The humans who remained on Earth moved underground because the continents were uninhabitable.The cities of the future are built underground to survive, and in contrast to the dry land, it is very wet underground, and people have built tall buildings underground, because it is dark, it is full of neon lighting, and there is only enough space to squeeze at least five people into a room.The sun of the future world scorched the earth, and people put on masks to block the sun and sand to walk on the earth.Because the desert environment is harsh, future humans because of wearing masks when traveling difficult to communicate, they invented a sensor worn on the head can communicate through brain waves.Due to the gradual extinction of animals and plants in the future, human children can only understand the green world of the past through images.The part of mankind that went to space exploration, because of the anxiety of the shortage of materials, invented and used the technology to convert part of the garbage into food.