OPINION:
The Earth has warmed approximately 0.7 degrees Celsius since around 1850, when the planet emerged from the Little Ice Age (“Mishmash of how U.S. heat deaths are counted complicates efforts to keep people safe as Earth warms,” web, Aug. 13).
Most of that warming occurred before 1940. There has been no measurable warming since about 1998, aside from minor blips caused by El Nino, according to accurate satellite measurements.
EDWARD SAGER
Cochrane, Alberta
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