I see the folly in your thinking: OBVIOUSLY the mars landers are made by Chevrolet, and have single-handedly pollluted the atmosphere of Mars. And if you recall, Mars lacks the AlGore, which means nothing is keeping it from spiralling out of control.
And they carefully ignore that all mammals, (animals and man) exhale CO2 constantly. Yet earth’s air is .3% CO2? Looks like the greenhouse ain’t green enough Ethyl.