Quote:
Originally Posted by Tenchu
Nevertheless, it is a rise of what, 20%? It won't start at zero, because nature does contribute CO2 herself. To start at zero you would have to go back at least 4.5 billion years...
I just want to know where it came from. He says we only contribute 0.12% of the CO2. Does that mean that the natural causes have increased by 20%? Or is it more plausible that we have bumped it up, and we are responsible for somewhat 30% of CO2 levels?
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I am not disagreeing with you, and I am not saying the starting point must be "zero". I am saying graphs that don't have "zero" as a baseline throw up a red flag to me.