Ever since the first international negotiations on climate change in the early 1990s, the European Union has aspired to play a leading role in global climate politics.This book engages in a longitudinal analysis of the EU’s participation in and impact on the United Nations climate regime.It provides not only comprehensive insights into the evolution of EU foreign climate policy, but also a thought-provoking audit of the potential and limits of the EU’s influence in a major domain of global affairs.