Donald Tusk, President of the European Council, addressed world leaders on behalf of the EU at the UN General Assembly on 26 September.
He called for the defence of multilateralism and the rules-based international order in his speech to the assembly: "Our life can change into hell, if we do not find, here at the United Nations, adequate solutions to global threats, such as: armed conflicts and terrorism, nuclear proliferation, or the destruction of our environment." President Tusk also focused on the current environmental emergency and stressed the EU's leadership in implementing the Paris Agreement and its ambition to become the world's first carbon-neutral continent. In addition, President Tusk pleaded for the protection of truth in public life, freedom, rule of law, and international solidarity: "To protect rule of law, you really have to accept that law should be above power, not at its beck and call. If you want to follow the principles of international solidarity, you always have to help the weaker, if they are attacked by the stronger and the ruthless. Like in the case of Ukraine, for example."
The opening of the United Nations Climate Action Summit on 23 September, convened by the UN Secretary General António Guterres, was attended by President of the European Council Donald Tusk, First Vice-President Frans Timmermans and Commissioner Miguel Arias Cañete. The summit aimed to advance climate action and to step up the implementation of the Paris Agreement. Ahead of the summit, the European Commission adopted a blueprint reaffirming the EU's commitment to lead the fight against climate change. The EU is on its way to achieve its 2030 greenhouse gas emissions reduction target. It also provides over 40% of the world's public climate finance.
On 22 September, First Vice-President Frans Timmermans and High Representative/Vice-President Federica Mogherini met with the United Nations Secretary-General António Guterres, further strengthening the strategic EU-UN partnership. On 23 September, High Representative/Vice-President Federica Mogherini hosted a ministerial meeting of the International Contact Group on Venezuela to discuss the latest development in the country and its effects on the region. The following day, together with Commissioner Christos Stylianides she hosted a new edition of the traditional side event on Syria, showcasing the EU’s commitment to finding a political solution in Syria and to address its regional challenges. On 25 September, High Representative/Vice-President Federica Mogherini opened the day by hosting a ministerial meeting of E3/EU+2 and Iran and in the afternoon delivered a speech on behalf of the EU and its Member States at the 11th Conference on Facilitating the entry into force of the Comprehensive Nuclear-Test-Ban Treaty.
Confirming the EU's commitment to multilateralism, High Representative/Vice-President Federica Mogherini said during her speech at the launch of the Alliance for Multilateralism on 26 September: "Multilateral solutions are much more effective, because only by joining forces we can tackle the complex crises of our times." The aim of the Alliance initiated by France and Germany is to promote international cooperation at a time of rising nationalism and isolationism.