Was Earth already heating up, or did global warming reverse a long-term cooling trend? https://www.tucsonsentinel.com/opinion/report/021623_global_warming_op/was-earth-already-heating-up-or-did-global-warming-reverse-long-term-cooling-trend/
Over the past century, the Earth’s average temperature has swiftly increased - but what about the thousands of years before the Industrial Revolution, before thermometers, and before humans warmed the climate by releasing heat-trapping carbon dioxide from fossil fuels?
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