Global Warming

But on a different globe. Since 1970, Mars has experienced global warming similar to Earth. But of course the causes are completely different.

Or are they? It seems to me that the US landed our first spacecraft on Mars in the 1970s. This must be all the fault of the USA, polluting even neighboring planets. We obviously should have done more to ensure that the Viking, Pathfinder, and Exploration landers were EarthMars smart.