Read this article which reports that both Mars and Earth have experienced the same 0.5 degree Celsius global warming in the last 35 years. The best information we have about Mars shows it to be uninhabited, therefore human endeavor cannot be blamed for a warmer Mars.
If Earth and Mars are warming at the same rate, that suggests the strong possibility of a common causal factor - very likely to be an increase in solar radiation. Or the similarity might be due to coincidence.
