In 1978, government experts said the exact opposite of everything government experts say now.
There wasn’t enough data to make conclusions about the southern hemisphere. Government scientists now just make up southern hemisphere data, and report it to 0.01 or 0.001 precision.
The polar vortex was increasing due to global cooling
Scientists observed no correlation with CO2
International Team of Specialists Finds No End in Sight to 30-Year Cooling Trend in Northern Hemisphere – View Article – NYTimes.com