We develop the concept of aggregate emission targets, which are goals for national emissions but do not dictate the forms of regulation used to achieve the goals. We compare aggregate emission intensity, quantity, and price targets adopted at the national level but implemented cost effectively...

Plurilateral initiatives are again gaining importance in climate diplomacy as a complement to multilateral efforts – not least in view of the lack of progress in implementing the Paris Agreement and more difficult conditions in the UN process. New alliances are expected to facilitate agreement...

With the publication of its Synthesis Report in March 2023, the Intergovernmental Panel on Climate Change (IPCC) has completed its work programme for the sixth assess­ment cycle. The IPCC reports, and in particular the respective Summary for Policy Makers (SPM), provide a scientific basis for...