Re: Richard Gardner's Jan. 21 letter, "Scaremongering the climate science": I have some points to add to the discussion.

Among several questionable claims, Gardner stated: "And, for 15 years, also contrary to predictions, temperatures have not been rising."

This assertion contradicts the National Oceanic and Atmospheric Administration's data (a key word here), which are based on the combined global land and ocean-surface temperatures. According to NOAA, 2013 is tied with 2003 for the fourth hottest year on record. Using "slightly different methods," scientists at the National Aeronautics and Space Administration found that 2013 is tied with 2009 and 2006 for the seventh hottest year (scientists rarely agree).

Moreover, again according to NOAA, the 15 hottest years on record include all the years in this century.

But, there are always skeptics. For one example among several, Fred Singer, retired University of Virginia professor of physics, and Dennis Avery, former agricultural analyst for the U.S. Department of State, co-authors of "Unstoppable Global Warming: Every 1,500 Years" (updated and expanded edition), argue that global warming is part of a natural 1,500-year solar cycle (give or take a few centuries). Among their claims is that the assertions of modern climatologists (all the thousands of them around the globe, I suppose) should be discounted because, apparently, they are only trying to get more funding and they hate prosperity.

Perhaps Virginia's former attorney general, Ken Cuccinelli, was inspired by Singer and There are converted skeptics. Richard Muller, professor of physics at the University of California at Berkeley and former skeptic, is the author of a commentary that appeared in The New York Times on July 28, 2012, entitled "The conversion of a climate-change skeptic." The commentary began: "Call me a converted skeptic."

He went on to say later in that article: "Humans are almost entirely the cause." In this article, there is much of interest for skeptics and believers alike.

There are differences in opinions on the current warming trend. But, while opining, we should be mindful of what Daniel Moynihan once remarked: "Everyone is entitled to his own opinion, but not his own facts."

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