Just for the sake of accuracy, global warming talks about average global temperature, not particular day to day temps. One of the symptoms of increased global average temp is more weather extremes, both hot and cold (like the unseasonable snow you're having...). Just saying, it may be better to read up on it a little than to trust to the likes of Rush "The Drug King" Limbaugh for analyses on such a topic. Many times what is seen by those unfamiliar with the topic is actually one of the strongest data points supporting the efficacy of this position.
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LR