Just the raw numbers 280 versus 380 might seem to be around 74% increase.
If you are willing to ignore the parts per million that these figures represent...then it become a change of 100 ppm which is 1 - 04.
Having resisted this funfest of a thread until now, I lose the battle with boredom. I come with a question:
What does everyone suggest we do? I mean as of this year for the next 20 years? and, specifically - no fair to say quit spewing CO2 without giving a reasonable plan as to how -
James