----- Nội dung ảnh ----- Earth is becoming very crowded. In the future, many people believe that the (31) ________ will continue to increase. So, the question is, where will all the people live? I believe that most people will live on (32) ________. We can build these close to Earth and travel between them. It will be easy to build new space stations when we need more places for people to live. However, there might not be a lot of room for people to move and exercise. They (33) ________ also be very expensive to build, but they will have a great (34) ________ of Earth and they will be safe.
I think other people will live on Mars. There will be large cities with lots of people in them. We will have to build these cities under a glass cover. These places will be even easier to travel between. However, they will be dangerous. If we damage something and the air gets out, it will cause a lot of damage. It will also have less (35) ________.
We don’t know where we will live in the future, but we will find some interesting solutions for our large population.
