Intergovernmental Panel on Climate Change: Sixth Assessment Report

This report presents current evidence of changes in the climate. The report reinforces earlier Intergovernmental Panel on Climate Change scientific assessments that human activities are the primary driver of many of these observed changes. The new report concludes, “It is unequivocal that human influence has warmed the atmosphere, ocean, and land.” While climate change is the result of human and natural climate drivers, greenhouse gases (GHGs) emitted by human activity have had the greatest effect, including the observed increase in global average surface temperature.