Global cooling, the '70s, fashion trends.
If Wikipedia can be believed, here are a few facts about Global Cooling Dr. Bunson Honeydew is selectively omitting:
Concern peaked in the early 1970s, partly because of the cooling trend then apparent (a cooling period began in 1945, and two decades of a cooling trend suggested a trough had been reached after several decades of warming), and partly because much less was then known about world climate and causes of ice ages. Although there was a cooling trend then, it should be realised that climate scientists were perfectly well aware that predictions based on this trend were not possible - because the trend was poorly studied and not understood...However in the popular press the possibility of cooling was reported generally without the caveats present in the scientific reports.
The term "global cooling" did not become attached to concerns about an impending glacial period until after the term "global warming" was popularized. In the 1970s the compilation of records to produce hemispheric, or global, temperature records had just begun.
While neither scientists nor the public could be sure in the 1970s whether the world was warming or cooling, people were increasingly inclined to believe that global climate was on the move, and in no small way.
In 1972 [Caesare] Emiliani warned "Man's activity may either precipitate this new ice age or lead to substantial or even total melting of the ice caps"Mallard's entitled to his own set of opinions, but not his own set of facts.