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Since the dawn of the industrial revolution in the late 1700s, how much has the carbon dioxide concentration in Earth's atmosphere increased?

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Since the dawn of the industrial revolution, the carbon dioxide concentration in Earth's atmosphere has increased from 0.0288% in the late 1700s to 0.0396% in 2013, which is an increase of 38%.

DocumentationLong-Term Carbon Dioxide History Recent Carbon Dioxide Data