[SamAdams76]

65 below zero? They must be having one of those polar vortex’s. Maybe if we started sending gas-burning cars up there, we’d start warming the planet up some.

[kosciusko51]

Most of Mars’ atmosphere is already carbon dioxide.

[Campion]

Supposedly it can get up to +70 on a summer day near the equator, but -65 is more typical.

Your "gas-burning cars" aren't going to work very well, at 1% of the atmospheric pressure of earth, and 95+% of that is CO2.