Elon Musk wants to build a self-sufficient city on Mars before 'cataclysmic event' takes place on Earth (!)

Elon Mush is a lying dickhead, and anyone who pays the slightest bit of attention to his ravings needs their head examined!

From Wikipedia...

"The atmosphere of Mars is the layer of gases surrounding Mars. It is primarily composed of carbon dioxide (95.32%), molecular nitrogen (2.6%) and argon (1.9%).[2] It also contains trace levels of water vapor, oxygen, carbon monoxide, hydrogen and other noble gases.[2][4][1] The atmosphere of Mars is much thinner than Earth's. The surface pressure is only about 610 pascals (0.088 psi) which is less than 1% of the Earth's value.[1] The currently thin Martian atmosphere prohibits the existence of liquid water at the surface of Mars, but many studies suggest that the Martian atmosphere was much thicker in the past.[3] The highest atmospheric density on Mars is equal to the density found 35 km above the Earth's surface."

Believing we're going to colonise Mars is exactly the same magical thinking as the mediaeval alchemists' search for the Philosopher's Stone.

Read a book, FFS!