As we know from the back-and-forth arguments
about alleged terrestrial 'global warming', humanity
does not have airtight evidence that CO2 is the
major contributor to global warming
[CFC's and H20 vapor may play a much larger role].
i.e...CO2 is 1/3000th of our atmosphere; H2O vapor is
on average 1/50th...a huge difference.

How do we look for that CO2 'global warming' evidence or cause-and-effect link?

How about an extreme-energy experiment on
another planet and its atmosphere?

The planet?.....Mars.

The experiment?....
Sending an nuclear-weapon to that region of Mars
containing that large concentration of carbonates on
the surface of Mars...

The nuclear explosion should release millions [maybe billions] of tons
of radioactive C02 into the martian atmosphere from the carbonates.

That rapid release of huge "additional" quantities of CO2
into the martian atmosphere should result in "global warming"
effects that can be directly measured by orbiters and surface
probes...It will help in our understanding of that climate
phenomena with PRACTICAL RESULTS for our climate.