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re: People who don't vaccinate their children are...
Posted on 4/16/15 at 11:59 am to cokebottleag
Posted on 4/16/15 at 11:59 am to cokebottleag
quote:
We also know the world was previously warmer than it is now, with lower CO2 levels, and vice versa.
CO2 isn't the only thing that can cause warming. Hence the difficulty in saying for certainty that the increase of CO2 concentration is benign or causing a global catastrophe.
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