The UN’s Intergovernmental Panel on Climate Change (IPCC for short) is a highly influential organisation that has heavily shaped public and scientific opinion on climate change. In their most recent Assessment Report — published in 2013/2014 — they concluded that most of the climate change since at least the 1950s was human-caused.

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Figure 1. The IPCC Working Group 1’s highly influential 5th Assessment Report (2013).

The IPCC reports have been used to justify international efforts to try and reduce carbon dioxide emissions, such as the Kyoto Protocol (1997) and the more recent Paris Treaty (2015). They also are heavily relied on by scientists studying climate change. …


Dr. Ronan Connolly

Independent scientist, environmentalist & writer (Dublin, Ireland)

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