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Ask Marilyn: What About Man-Made Global Warming?
Pradeep Manudhane of Canton, Ohio, writes:
Marilyn: I was surprised by your response to the global warming question (January 20, 2013), particularly:
1) Your leaving out the fact that accurate weather records have been kept for only about 125 years now, whereas the Earth is about 4.5 billion years old. Thus, it is problematic to assert that man has caused global warming.
2) You left out the fact that there were times (millions of years ago) that the Earth had more carbon dioxide than today. This points against man-caused global warming.
3) You didn't point out that sunspots have cycles of variable activity.
4) You didn't address that the Vikings did a considerable amount of farming on Greenland about 1,000 years ago, well before man could have had an impact.
I have loved meteorology since childhood, but am annoyed by those who push for an extremist agenda.
Please re-read the question and answer. Neither referred to any possible contribution by humankind. They were only about whether superstorm Sandy was caused by global warming. (I believe it was probably not.)
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