How to measure Mars with earth standard to meet human habitation?

If Mars is to be measured by the earth's standards, it must have oxygen, water and a suitable temperature. When we explore space, we are always looking for planets similar to the earth's environment. In recent years, we think that Mars is more in line with this condition, and even put forward? Immigrating to Mars? This plan. But we can see that if we immigrate to Mars now, the present Mars is not suitable for human survival and development at all.

There must be enough water. According to our current view on the origin of species, people think that the first life on earth was born from the ocean. So without water, there would be no life on the earth. And our survival is also inseparable from water. We know that a person who doesn't eat for a week may still live, but if he doesn't drink water for a week, the possibility of living is very small. Without water, human beings can't survive. So if Mars is to be suitable for human habitation, it must have water. Recent research shows that some traces of water impact have been found on Mars, and some scientists believe that there are hidden rivers in the underground part of Mars.

There must be oxygen. Why are many planets unsuitable for human life and survival at present? Because there is no oxygen on it. Human beings can't live without oxygen. Without oxygen, we can easily suffocate. All cells in our body must have oxygen to survive and be active. So we can't live without oxygen. But in our current exploration of Mars, the oxygen content on Mars is very scarce. At present, we must wear special clothes and have oxygen supply when we enter space.

At present, Mars can't make people live on it. Mars can't meet our basic physiological needs yet. In the process of exploring the universe, we haven't found a star that is completely similar to the earth and can satisfy human survival. So we should take good care of the earth.