There's not.

The first problem, in order to reverse a chemical reaction, you need to provide at least the offsetting released energy of the initial reaction. That means for CO2 you need to provide at least as much energy as was released when the carbon oxidized in the first place.

The second problem is that the CO2 is diluted in the atmosphere. Consider the amount of energy needed to remove salt from ocean water, it's not simple.

It just takes a lot of energy to that what was done by burning fossils in the first place.

Do you think an LLM can change the laws of physics?

Given that everything important has trade-offs, no, AI, even if it were very very smart wouldn’t be able to “fix everything”

The rule of thumb is that technology creates problems that cannot be solved with the same level of technology.