Why Mars is not suitable for human habitation?

Mars is not suitable for human habitation for several reasons:

1. The atmosphere is thin, only 1% of the earth's, mainly composed of carbon dioxide (95.3%), nitrogen (2.7%), argon (1.6%), trace oxygen (0. 15%) and water vapor (0.000).

2. Due to the thin atmosphere and low carbon dioxide content, the greenhouse effect cannot be formed. The temperature on Mars has been kept below zero, with an average temperature of minus 50 degrees in summer and minus 120 degrees in winter.

With little oxygen, people will suffocate immediately.

Because the atmosphere is thin, a lot of ultraviolet rays can shine on the surface of Mars.

Although there are residual water ice in some places on Mars (there was an ocean on Mars more than 30 years ago), it is difficult to find it.

6. There is no environment and resources (food) like the earth.

Extended data:

Mars is basically a desert planet, its surface is covered with sand dunes and gravel, and there is no stable liquid water body (2065438+September 28th, 2005, NASA announced that there is a small amount of water on Mars. According to Agence France-Presse reported on July 25th, 20 18, researchers from the European Space Agency (ESA) said that the first liquid groundwater lake was discovered on Mars.

Mars is the fourth planet in the solar system from the inside out, belonging to the earth-like planet. Its diameter is about half that of the earth, and it takes twice as long to make a revolution tilted from the axis with a similar rotation period. The West calls it Mars Mythology Star, God of War and China call it Fluorescent Star, because it is as bright as fire, and its position and brightness often change. Its orange-red appearance is because the surface is covered with hematite (iron oxide), and the prefix areo- is Mars in English. Mars was once considered to be the most likely planet in the solar system to have extraterrestrial life.

References:

Mars-Baidu encyclopedia