If there is water and oxygen on Mars, can humans live there?

If there is water and oxygen on Mars, it does reach a certain standard of human survival, but it is not only these two things that can survive. To know whether Huo Ying is suitable for human habitation, we need to consider from many aspects.

A place suitable for human habitation must have water and oxygen, followed by a suitable temperature. If it is too hot or too cold, human beings can't survive in that place successfully. After all, such extreme weather is ok for a short time, but after a long time, it will make people miserable and have no life experience. Because Mars is far away from the sun, the surface temperature of Mars is very low, even more than 200 degrees below zero, and human beings cannot survive. Therefore, if you want to immigrate to Mars, the first problem to be solved is the temperature. Moreover, not only water and oxygen can be used for human survival, but also human survival needs to supplement nutrition and energy and eat. If you immigrate to Mars, but there is no land to grow and no environment to raise livestock, you will definitely eat even if you bring a lot of food. At this time, mankind will face a very serious famine. Therefore, it is very important to cultivate and develop a large number of arable land on Mars, which is the basis of human survival. There is also a great demand for resources and minerals. If there are no such resources on Mars, then human immigrants will not have the resources needed to maintain their past life and production. Without oil and other substances, life will be very difficult in the future, and the supply of many infrastructures will become a problem. Because oil is actually a necessity of human life, many common things are made of oil. Without oil, it is difficult for us to maintain our lives.

Therefore, if you want to choose Mars as the future immigration place, you must consider and evaluate the overall and internal environment of that planet, otherwise human beings can't live a good life at all.