How else do you explain:

1. Temperature increase of about 0.5C since the 1970s,

2. Variations in radiation and temperature across the surface planet that are generating strong winds which can stir up giant dust storms, trapping heat and raising the planet’s temperature,

3. Widespread changes, with some areas becoming darker… and when a surface darkens it absorbs more heat, eventually radiating that heat back to warm the atmosphere,

4. The rapid climate change is happening so fast that the planet could lose its southern ice cap.

Is it human driven or a natural phenomena?

Considering this global warming is occuring on Mars, I doubt we can blame this one on Republicans driving SUVs.