Is there global warming on Mars?

Yes, in fact Venus and Mars is heating up suggesting that this isn't global warming but something is going on with the sun causing a slight increase in temperature.

A:

It is hard to understand how anyone could claim global warming is happening on Mars when we really knows so little about the planet. Yet they do, and the alleged reasoning is that if other planets are warming up, then there is some solar system-wide phenomena at work and therefore it is not human activity causing our planet's climate change. We do know the sun is not heating up other planets in our solar system because we can accurately measure the sun's output here on Earth, and so there is no good reason to speculate about global warming on Mars.

Mars is quite different to Venus, which does have an extreme greenhouse effect and the highest temperatures in the solar system, because the atmosphere on Venus is almost pure carbon dioxide. There is little empirical evidence that Mars is warming, and Mars' climate is primarily driven by dust and albedo, not solar variations.