Half of observed warming pre-dates human cause
Of the 1 degree F warming during the last century, half occurred prior to the point at which human emissions could have been the cause.
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Anthropogenic Climate Change »Anthropogenic Climate Change
Human impact on the Earth's climate? »Human impact on the Earth's climate?
Case for significant anthropogenic forcing is clear »Case for significant anthropogenic forcing is clear
Scientific measurements provide strong supporting evidence »Scientific measurements provide strong supporting evidence
Earth's globally averaged surface temperature is rising »Earth's globally averaged surface temperature is rising
Temperature rises associated with industrialization »Temperature rises associated with industrialization
Half of observed warming pre-dates human cause
Significant anthropogengic impact predates 20th Century »Significant anthropogengic impact predates 20th Century
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