| http://www.w3.org/ns/prov#value | - Increasing levels of greenhouse gases like carbon dioxide (CO2) in the atmosphere since pre-industrial times are well-documented and understood.The atmospheric buildup of CO2 and other greenhouse gases is largely the result of human activities such as the burning of fossil fuels.An ???unequivocal??? warming trend of about 1.0 to 1.7??F occurred from 1906-2005.
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