There was a piece on the ABC website today, concerning the viability of living on Mars, a concept debunked by Bill Nye with some serious observations on the absurdity of some of the spuikers "blue sky" dreams. Terraforming is a good example. Musk wants to go, which I am supporting, but I suspect it's a way to sell one way tickets.
Terraforming Mars was debunked by Nasa so I don't know what Musk is on about. There's just not enough CO2 on Mars to increase atmosphere pressure enough.