well us humans sure aren't helping, i read a sci-am article that outlined one scientist's theory based on ice core air bubble samples that we actually flattened out the bottom swing of a curve in the middle ages with our activity on the sine wave of CO2 fluctuation, thus actually stopping a minor ice age.
the equilibrium nature of CO2 and oxygen for one example is a funny one - more CO2 means stronger plant growth so it's not quite as simple as many would have us believe.
there's meandering back and forth of the trends on many things, there's something like 3 or 4 major solar cycles just in the last ~100 years of measurement and we're hitting the heights of a couple here in a few years.
we're not helping but at most we flatten out the huge swings, i mean one big forest fire easily beats the hell out of anything humans do for the entire year.
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