What feature distinguishes Titan from Mars as a candidate for open-air terraforming?

Answer

Titan has an entirely alien chemistry with liquid methane and ethane lakes

Titan is characterized by a frigid temperature (around -179 extdegree C) and surface lakes composed of liquid methane and ethane, presenting an environment fundamentally alien to Earth's biology.

What feature distinguishes Titan from Mars as a candidate for open-air terraforming?

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