Excellent find. Key quote:
"The most conservative scientific estimate that the Earth’s temperature will rise 1 to 7 degrees in the next 30 years, said Brown."
Dated June 30, 1989
Global temperature anomaly 2018: +0.83 Celsius
"The most conservative scientific estimate that the Earth’s temperature will rise 1 to 7 degrees in the next 30 years, said Brown."
Dated June 30, 1989
Global temperature anomaly 2018: +0.83 Celsius
2) Also from your own source of NASA, the end of the last ice age saw a global temperature increase of "4 to 7 degrees C over 5000 years"
Does that not make you wonder if 0.83C in 30(!) years is an extremely accelerated rate?
I think it is interesting in itself to read predictions made thirty years ago for the next thirty years and compare them with actual data. What I get from it is that the analysis was fundamentally correct- temperatures have kept increasing; but I also see a tendency to overconfidence and exaggeration: the source says that the most conservative estimates put the warming by 2018 between 1 and 7 degrees- even if it's Fahrenheit it literally means that we're at the lower end of the "most conservative estimates".