I have always been led to believe that no matter what steps we take to curb CO2 emissions, they will persist in the atmosphere for years, no matter how much they are absorbed by forests and oceans. We've also known about the steadily warming planet and rising ocean levels for at least 60-50 years now, and in the time since then, new enviromental laws and stricter standards have been introduced. You're all better informed on this issue than I am, but I have a feeling that the tipping point was nearly least a century ago, long after the Industrial Revolution, and there's very little we can do without making things worse.
The main greenhouse gas, by a very wide margin is water vapor. It has a high capacity to hold heat, and carbon dioxide's effects are minuscule by comparison.
But the computer models are not able to deal with atmospheric moisture and they can't blame it on industry, so carbon dioxide had to be made the "bad guy" even though green plants desperately need it for photosynthesis.