Question for some knowledgeable science-type Freepers....
Global temperatures as far as climate change is concerned, are tracked to 0.1 degree celsius...exactly when did modern temperature instruments become capable of measuring to that tolerance?
Further, exactly when did those close tolerance instruments and their measurments become reliable through regular calibration practices?
“...exactly when did modern temperature instruments become capable of measuring to that tolerance?”
Coincidently the same time the left realized that they could profit from it.