Meh x 2
"100ppm in a century? No"
I am not aware of any data for the PETM that can provide accurate data for *100 year timesteps*. I am only aware of averages spread across 10,000+ years. If you can point me to a scientific source that provides PETM data in accurate, century timesteps (which are *not* a tiny part of a much larger average) - so that I can all draw a direct comparison against the last century - please do. If not, I fail to see how that statement holds.
Don't get me wrong - we are contributing to a (potentially) big problem - without doubt. It's the FUD driving some of the science that I take issue with.
At the end of the day we are not yet clever enough to determine if our current experiment on the global climate will roast us all. Even if we were to become able to accurately determine the furture for the climate, whichever camp was left our in the cold would always find a counter argument - it's the nature of the beast.