The CoR is the voice of regions and cities in the European Union (EU). Regions4 has been working collaboratively with the CoR Commission for Economic Policy (ECON) on sustainable development issues and the implementation of the SDGs, as well as with the Commission for the Environment, Climate Change and Energy (ENVE) in mutual support of the biodiversity and climate change agenda. Regions4 has provided input to influence future EU strategy on SDGs, biodiversity and climate change, and participates in CoR conferences and meetings along with its European regions.