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
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Human impact on the Earth's climate? »Human impact on the Earth's climate?
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Case for significant anthropogenic forcing is clear »Case for significant anthropogenic forcing is clear
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Scientific measurements provide strong supporting evidence »Scientific measurements provide strong supporting evidence
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Earth's globally averaged surface temperature is rising »Earth's globally averaged surface temperature is rising
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Temperature rises associated with industrialization »Temperature rises associated with industrialization
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Half of observed warming pre-dates human cause
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Significant anthropogengic impact predates 20th Century »Significant anthropogengic impact predates 20th Century
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