Is it really livable to build Mars into a "second earth"?

Mars will build a second earth. In fact, people's transformation of Mars is still quite far away, and it can't be realized in a short time, because people expect to land on Mars from 2025 to 2030, that is, in the next 5 to 10, but landing on Mars and encouraging people to establish living areas on Mars that can make ordinary people live is a very far distance.

The gravitational environment of Mars is similar to that of the Earth. Mars also has Weibo atmosphere, and even its achievements are somewhat similar to that of the Earth. So in theory, Mars can build a living environment similar to the Earth, but people have to live in a space similar to a glass cover, because if people don't wear spacesuits, the gravitational environment of Mars has atmospheric pressure, and so on, and normal people's bodies can't bear it. In addition, the temperature changes extremely sharply. The lowest temperature on the earth may be MINUS 40 or 50 degrees, and 40 degrees in high places is similar. The temperature difference does not exceed 100, which is basically tolerable for human body, but the temperature difference on Mars can easily reach 200 degrees, which is unbearable for normal people.

And now the problem of landing on Mars has not been solved. According to the current flight speed of aviation technology, it takes about half a year to fly from the earth to Mars, which brings huge costs. This is the time to go and come back. The first problem to be solved is the voyage. If it takes a year to go back and forth, the time is too long and unrealistic, and the cost is too high.

At present, only some big countries are doing research on Mars, and many small countries have not considered this aspect, because rabbits, eagles and bears are the most important. The rest of the small animals are struggling to eat themselves. How can they get used to thinking about territory? The three great people mentioned above are busy making their own layouts, but it is difficult to really live on Mars in a short time, because it is difficult for people to live on the moon now, let alone Mars.

If human beings can predict how long there will be problems on the earth one day, and there is no way for human beings to enter the earth at that time, then all countries on the earth will combine all the materials on the earth and high-end scientific and technological forces to study how to migrate human beings to Mars in a short time. By then, the progress will be greatly accelerated, but there is no such great pressure now, more because of the layout of the space race in the next few decades, that is, hundreds of years, rather than the survival of mankind, and there is no such great pressure.