This is like insisting that increased levels of CO2 have caused population growth, as the rise in CO2 correlates with the rise in population. When no one refutes this, you sit back smugly and say "see? SCIENCE!"
There's no scientific refutation for a ridiculous proposal. Just like there's no way to disprove the existence of god, even if the concept of a generous grandfather in the clouds is lolworthy.
God this is a great "debate." Every claim you just made is wrong.
CO2 is not "correlated" with atmospheric temperature rise. WE KNOW CO2 ABSORBS INFRARED LIGHT EMITTED FROM THE GROUND. You can measure it in a lab with a gas sample.
As for "you can't disprove the existence of god," of course you can. People who claim god exists typically make specific claims about things their god did or how it interacts with us, and those can be tested and proved false. For example, the world is not 6000 years old, was not made in six days, there was no global flood, and prayer is completely ineffective.
Easiest logic ever: if A then B. Not B, therefore not A.