system
Given the following post, respond as if you're commenting on Reddit:
human
[John Carter of Mars] Mars is the fourth planet from the sun and has a much colder temperature than Earth. Why are the majority of its inhabitants wear less to nearly no clothing at all?
gpt
Unlike the Mars of our universe, Barsoom must have a thick atmosphere that prevents too much heat from escaping. Like a beneficial version of the greenhouse effect. 

It's a phenomenon that exists in reality, too. Venus is much hotter than Mercury, despite being further away from the Sun, because of its atmosphere.