Warmist Paul Stern: Earth has been showing strong signs of CO2-induced illness at least since 1959

A Medical Metaphor for Climate Risk, Including the Risk of Overreaction - NYTimes.com

[Paul C. Stern] Diagnosis. A physician must be careful to avoid two errors:  misdiagnosing the patient with a dread disease that is not present, and misdiagnosing a seriously ill patient as healthy.  To avoid these types of error, physicians often run diagnostic tests or observe the patient over a period of time before recommending a course of treatment.  Scientists have been doing this with Earth’s climate at least since 1959, when strong signs of illness were reported from observations in Hawaii.

Scientists now have high confidence that the patient has the disease.  We know the causes:  fossil fuel consumption, certain land cover changes, and a few other physical processes.