Environment Minister Barbara Hendricks hosted a conference which raised $10 billion for the Green Climate Fund’s projects to fight global warming. During his term, the German government pledged €800 million (2016) and €1 billion (2019) in contributions to the Global Fund to Fight AIDS, Tuberculosis and Malaria. In August 2015, Müller was part of Chancellor Merkel’s delegation to the first joint cabinet meeting of the governments of Germany and Brazil in Brasília. In January 2016, he participated in the first joint cabinet meeting of the governments of Germany and Turkey in Berlin. In September 2020, Müller announced that he would not stand in the 2021 federal elections but instead resign from active politics by the end of the parliamentary term. Director General of the United Nations Industrial Development Organization While still serving as minister, the German government nominated Müller as its candidate for Director General of the United Nations Industrial Development Organization (UNIDO). In July 2021, he was selected over Bernardo Calzadilla Sarmiento (Bolivia) and Arkebe Oqubay (Ethiopia) by the organization's Industrial Development Board. This selection was confirmed by UNIDO's 19th General Conference in late 2021. Müller up the position in December 2021. Political positions Human rights and development In April 2014, Müller became the first member of Chancellor Angela Merkel's cabinet to publicly confront world football's governing body FIFA over its allocation of the 2022 FIFA World Cup to Qatar, criticizing that the choice contradicted global efforts to tackle climate change and that human rights breaches on the country's stadium construction sites even extended to "slave labor." Later that year, he publicly accused Qatar of funding Islamic State militants, arguing that the country was the "keyword" when it comes to IS financing. In June 2017, Müller voted against Germany’s introduction of same-sex marriage. International agriculture Müller is strongly in favor of extending subsidizing German agriculture for export, which he hopes will lessen the flow of refugees coming to Europe Relations to the African continent Müller has in the past voted in favor of German participation in United Nations peacekeeping missions as well as in United Nations-mandated European Union peacekeeping missions on the African continent, such as in Somalia – both Operation Atalanta and EUTM Somalia – (2009, 2010, 2011, 2012, 2013, 2014, 2015 and 2018), Darfur/Sudan (2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 and 2018), South Sudan (2011, 2012, 2013, 2015, 2016 and 2017), Mali (2013, 2014, 2015,