evidence: The Intergovernmental Panel on Climate Change (IPCC) is the most authoritative international source on the causes and potential consequences of climate change. It was established in 1988 by the United Nations Environment Programme and the World Metrological Organization and currently has 195 member countries. The IPCC produces special reports and assessment reports by experts in its member countries who review the existing evidence and research on climate change and identify the strength of scientific agreement. The IPCC First Assessment Report was published in 1990, and it is currently in its sixth assessment cycle, which will produce four reports by March 2023. Most of the reports of the IPCC are prepared by experts who form three working groups on: the physical science basis; impacts, adaptation and vulnerability; and climate change mitigation.