Peter Gwynne famously raised the alarm over global cooling in the mid 1970s, but he now has a new message for climate skeptics: “It’s time for deniers of human-caused global warming to stop using an old magazine story as ammunition against the consensus of today’s climate scientists,” he opined this week. But back on April 28, 1975, Gwynne wrote in Newsweek, “The central fact is that, after three quarters of a century of extraordinarily mild conditions, the Earth seems to be cooling down.” So what happened? “While the hypotheses described in that original story seemed right at the time,” he explains, “climate scientists now know that they were seriously incomplete. Our climate is warming – not cooling, as the original story suggested.” The globe goes through periods of cooling and warming all the time. It’s called climate. The only thing that hasn’t changed is scaremongering. Still, Gwynne is frustrated that “certain websites and individuals that dispute, disparage and deny the science that shows that humans are causing the Earth to warm continue to quote my article.” Because this time the science is settled. More…