Common but differentiated responsibilities and respective capabilities  is a key principle within the United Nations Framework Convention on Climate Change , and attempts to acknowledge countries' diverse development situations. The Convention and its Kyoto Protocol operationalised the principle by committing developed  countries to absolute emission reduction or limitation targets and exempting developing countries from any binding reductions in emissions . In contrast, the Paris Agreement distinguishes between 'developed' and 'developing' countries instead of Annex I and non-Annex I countries and acknowledges significant asymmetries and inequalities, not only between developed and developing countries, but also between developed and developing countries themselves, both in terms of vulnerability to climate change impacts and capacity to mitigate the problems. The literature contains extensive analyses of CBDR-RC in relation to equity in mitigation efforts in the post-2020 regime , but little in relation to adaptation, particularly relating to how it plays out in the Paris Agreement.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report