Some American scientists predict that there will be a city with a population of one million on Mars. Is Mars suitable for human habitation?

It is actually a relative concept to see whether a place has moved. For example, the ancient seaside, because of the cold winter, typhoon in summer, less arable land, it is difficult to grow crops in saline-alkali land, so the coastal areas at that time became very uninhabitable.

With the change of human industrial structure, today's coastal areas have better conditions to engage in industrial production activities. For example, our nuclear power plants can only be built in coastal areas, because the coastal areas have unlimited seawater reserves, which is very convenient for nuclear power plants to cool down. For another example, our Haisheng offshore wind power station and the subsequent electrolytic water hydrogen production plant can only be built at sea. Other industrial enterprises, such as petrochemicals, are often located in coastal areas because they involve pollution and need to spread in time.

In ancient times when natural agriculture was dominant, people tended to live in places with better cultivated land conditions in order to obtain more convenient food sources. In ancient times, this inland area was undoubtedly more livable.

Today, with the convenience of shipping, fishing, transportation and communication, coastal areas have become more livable than inland areas.

Today, coastal areas have shown great advantages in international trade. There are usually more trading companies, companies engaged in international trade and cross-border electronic commerce, and countless export processing enterprises in coastal areas. Due to the convenience of trade, coastal areas are often more developed than inland areas.

In addition to the developed economy, coastal areas also have convenient conditions for closer ties with other countries through international trade. Advanced cultures welcomed by all countries will also spread among major international coastal ports for the first time. So that today's coastal areas have become the concentrated representatives of advanced culture to a certain extent.

Having said that, to sum up, the once barren land may become the leader of civilization in a blink of an eye after the technical conditions change.

And we should see that today's more advanced people will choose indoor activities more than outdoor activities. Today's heating, cooling, dehumidification and humidification conditions are far from those before. For example, most of our stadiums and sports facilities, such as tennis, running, badminton and martial arts, such as gun battles, are located indoors. After the facilities are set indoors, people can participate in their favorite sports activities no matter whether it is windy or rainy or whether it is cold or hot.

I believe this will also be a situation that human settlements on Mars will show in the future.