With its Green Deal, the EU is attempting to take a leadership position internationally. Europe’s emissions are decreasing rapidly, so a successful international climate change effort will require the engagement of major economies and emitters such as China, India, South Africa, Russia, Saudi Arabia, Turkey and Indonesia. A ‘new’ EU climate diplomacy is therefore a central element of the Green Deal. What should the main pillar of this EU climate diplomacy be – carbon border measures, special trade regimes and financial support for low carbon technologies? Will the tools be sufficient to engage other countries or is the EU overplaying its hand?