> earlier you show a 45ppm increase over the last 50 years. At 3% manmade,
> that is a total ACO2+ of 1.35 ppm. In fifty years? It works out to .0270
> ppm/year? Please do check my math.
Who says only 3% of the increase is man made?
Lets say over 50 years 1 ton of natural C02 and 0.03 tons of man made C02 were released (eg 3%). In the past nature was roughly in balance so roughly 1 ton was also absorbed in that time. That means 100% of the increaseis man made even if man was only responsible for 3% of the release.