Should not be a surprise since we have know about CO2 Levels and fossil fuels for many decades.

The surprise is nothing was real was done. Compare what our generation did with this knowledge against the sacrifices the WW2 generation did. In WW2 many items were rationed in the US for the war effort, including gas.

We knew something had to be done to be done in the 70s, but did we sacrifice our lifestyle for the good of the world ? No, our self-centered generation pumped even more CO2 into the air and is continuing to do so. Our grandchildren will pay dearly for what we did and are doing in decades down the line.

I assume you mean boomers? Might time to stop blaming them, since at this point some of them are great-great-grandparents and the following generations do not seem to have shown any more appetite for changing course.