Global warming help...?

  • Thread starter Thread starter geri.II
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geri.II

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One of my friends told me some scientists have said there is no such thing and what's happening now happens every so often.. or something like that.
I'm not sure how to explain it, if you know what Im talking about or trying to explain, what are the two theories of Global warming..(Like the scientists who say what my friend said, and the ones who didn't.. what exactly do they believe is going on)..
Sorry If this doesn't make much sense, Im somewhat confused myself.
Thanks in advance :).
 
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