In her new book, Curry acknowledges that a changing climate “has been the norm throughout the Earth’s 4.6-billion-year history.” She refuses to abandon the idea that we humans “are also changing atmospheric composition by increasing the emissions of CO2 and other greenhouse gases,” but she adds an important caveat:
This redefinition of “climate change” to refer only to human-caused changes to the atmospheric composition has effectively eliminated natural climate change from the public discussion.
The result is that the common parlance refers to “climate change,” with no mention of natural climate variability. Any change that is observed over the past century is now implicitly assumed to be caused by human emissions to the atmosphere. This assumption leads to connecting every unusual weather or climate event to human-caused climate change from fossil fuel emissions. Having acknowledged that climate change is the “norm” throughout the Earth’s 4.6-billion-year history, Curry understands that this politicized attribution of all climate change to humans burning hydrocarbon fuels is nonsense."
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