Transform Mars and create another earth, and mankind may have a second home. Mars is perfect for human habitation.

Ouyang Ziyuan is the chief scientist of China's lunar exploration project and the main promoter of Chang 'e-1 lunar exploration satellite. He co-authored a popular science book called "Rebuilding an Earth —— The Road for Mankind to Move to Mars". With the depletion of the earth's resources, it is probably the best choice to seek a new safe habitat for human beings. How to transform the reality of Mars? We can see what Ouyang Ziyuan said.

At present, the earth is the darling of the solar system. Only it has evolved what we call life, and only its distance from the sun and its own size are just right. If we want to find the conditions that the second "Earth" needs to meet, we must have the right light, the right atmosphere and the source of life-water. Mars is the planet most similar to the earth in the solar system at present, and its rotation period is very similar to that of the earth, so it has the division of day and night, similar to the inclination angle of the axis, so it also has the division of spring, summer, autumn and winter. It is adjacent to the earth, and the immigration plan.

Mars has been selected, how to carry out the transformation plan. First of all, there should be visible liquid water and a temperature suitable for human habitation on Mars, which is different from the urgent global warming on Earth. Mars is in urgent need of warming up, and even needs the greenhouse effect to raise the surface temperature of Mars, sublimate the dry ice on the ice sheet of Mars and melt the water ice. Mars needs to increase the concentration of carbon dioxide to make liquid water appear on the ground. The next step is to turn red Mars into a green planet. As the temperature rises, water will appear. Humans should cultivate mosses and fungi capable of photosynthesis on Mars, increase the oxygen content of Mars, further carry out afforestation plans, release more oxygen, accelerate the growth of plants, and thus change the composition of the Martian atmosphere.

When the Martian atmosphere meets the conditions suitable for human survival, people can go to Mars without wearing spacesuits. A large number of green vegetation will make water appear, and Mars will gradually become a blue planet, so as to realize the dream of building a new home. However, these changes will take centuries. When the Martian environment is not suitable for human survival at first, it is best to send robots to carry out the first transformation and "recreate the earth" with scientific and technological wisdom. Do you think the plan to transform Mars is realistic?