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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.
"Despite the mounting evidence, there are still some who would deny the veracity of human-caused climate change and its potential to disrupt and harm our communities ... The latest [IPCC] report makes no bones about stating the consensus that human-driven climate change is occurring and it is important. Hundreds of changes have already been observed that are consistent with climate change, temperature rises (documented below), and associated issues such as ocean acidification."