Terraforming Mars

Humans have conquered most of Earth except the deepest oceans. We are good at changing
our environment to suit our needs. The population of Earth is rapidly increasing and consuming
more resources that the Earth can provide. Already, potable water supplies have been reduced
in some parts of the world because of climate change.
Although Mars is a much smaller planet, its land area is similar to that found on Earth, because
our nearest planet does not have oceans. The recent discovery of seasonal flows of liquid water
hints at the exciting suggestion that the planet could be made suitable for human habitation.
What infrastructure is needed so that humans can live there and mine its valuable resources?
An alternative proposition is to “terraform” the planet, to deliberately change its environment to
provide Earth-like ecosystems and therefore suitable for humans.