[Perchant]

A buildup of carbon dioxide in the ancient martian atmosphere supposedly produced enough of a greenhouse effect to allow liquid water to flow for a time on the surface. The problem is that such a process should have deposited ample carbon-containing minerals on the planet's surface--something that hasn't been found.

They tell us that the martian atmosphere is all CO2 but now they say they can't find carbon on the surface? Where does the CO2 come from and where does it go? If martian volcanoes are belching CO2, why aren't they spewing carbon-containing minerals?

Now they have a theory that SO2 is responsible for past global warming on Mars. NASA's settled science has assured us that SO2 is a cooling forcer. I guess we'll have to give the kooks a few billion dollars to redo their science.

[RightWhale]

They tell us that the martian atmosphere is all CO2

Mars lost most of its atmosphere. It could easily hold a much denser atmosphere than it has. Was it all CO2? Not likely.