Exxon's current market cap is something like 300 billion. It is worth that much because of future claims it has on profits from the extraction, refinement and sale of oil. If Exxon makes enough to recoup that... you'll have another 50ppm of CO2 in the atmosphere.

So no. You won't have a huge sum of money to fix the sinking ship. You'll be bailing water from one compartment and throwing it into another.