Re S. Ellard's letter It's not a success when you lower your standards, in Wednesday's Daily Courier
Are humans responsible for rising temperatures causing shockingly costly, severe and increasingly frequent weather events, shifts in ocean currents, rising sea levels, ocean acidification, species loss, pestilence and infestations? Ellard says yes.
Not necessarily so, said University of Colorado professor of environmental studies Roger Pielke Jr., in recent testimony to the U.S. Senate.
"It is misleading and just plain incorrect to claim that disasters associated with hurricanes, tornadoes, floods, or droughts have increased on climate timescales either in the United States or globally.
"It is further incorrect to associate the increasing costs of disasters with the emission of greenhouse gasses."
He goes on to support each assertion and to mention that research indicates some human influence on climate.
"The inability to detect and attribute changes in climate events does not mean that human caused climate change is not real or of concern."
False, unsupported claims by alarmists and others, he says confuse and undermine the credibility of arguments for responsible action.
"It will be many decades, perhaps longer before the signal of human-caused climate change can be detected in the statistics" (of weather events).
That the global climate does change is indisputable. But it was not emissions from Stone Age campfires that melted the first ice cap or even the last, 14,000 years ago, nor was it emissions from the first steam engines that warmed up the Little Ice Age in the 1800s.
When the haze of scientific debate finally clears, man-made global warming may be relegated to just another chapter in an updated version of that classic reference The Extraordinary Popular Delusions and Madness of Crowds.