Quote:
Originally Posted by OhioBuckeye
Seems to me they base it on how much snow & ice is melting on the N. & S. Poles.
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It is a part of the information considered, but I think it is more a prediction of change that will add to the rate of change. If that makes sense.
Here is a NASA site that provides a lot of information and many links:
Scientific Consensus | Facts – Climate Change: Vital Signs of the Planet