seaver - that was a pretty cool analogy. earth is a pretty good place. everything i've read recently (no expert here, just what i happen to have read and i would rather not get attacked for saying something) that the science is still unresolved and hasn't proven anything.
the world is a pretty big place. i've heard other things give off a lot of various emisions, even cows since there are so many more than centuries ago.
if there have been cycles than it stands to reason that we're in another cycle and it will be difficult to prove humans caused this cycle.
we'll probably never know!
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