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Guy Callendar, the engineer who discovered human-caused global warming
A humble steam engineer put humans in the driver’s seat.
3 Other evidence mounted, and a tipping point came circa 1990, when the United Nations Intergovernmental Panel on Climate Change, scientific societies, and researchers began reaching a consensus that human-caused warming is underway and would cause dire effects, as is now happening. He had been quite confident this warming “is likely to prove beneficial to mankind.” Europe’s Little Ice Age (circa 1300-1850)—during which the average temperatures dropped some 2 degrees Celsius in the U.K., leading to crop failures, starvation, and mass death—had concluded only during his grandparents’ lifetimes. A little extra warmth, Callander posited, would not only expand the range and seasons of crops, but also, he concludes, “the return of the deadly glaciers should be delayed indefinitely.” He estimated that the planet held enough fossil fuels to multiply the amount of CO 2 in the air tenfold.
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