Americans’ concern about global warming has dropped a dramatic 15 points in the last three years, according to Gallup’s most recent annual Environment poll. Eighty percent of Americans now say they understand the issue “very well” or “fairly well,” but only 51 percent “worry a great deal or fair amount” about it — down from 66 percent just three years ago.

That 15 percent represents a substantial drop in public support for what was supposedly “settled science” and not open to further debate. More than four in 10 poll respondents also said the media has exaggerated the dangers of global warming.