Climate change graph
© Steven Goddard
Climatologist fear global cooling
© Newsweekdenisdutton.com/newsweek_coolingworld.pdf
Note that this super cold period from 1975 is now understood by climatologists to have been a super hot period, thanks to pioneering work done at Penn State University.

Hockey stick
© Penn State University
People in 1975 just weren't intelligent enough to know if they were hot or cold.