[2] During her apprenticeship years, she moved with like-minded friends to an abandoned farm in the nearby district of Lüchow-Dannenberg and joined a local organic farmers’ co-operative.

From 2017 until 2019, she served as chairwoman of the delegation to the Euronest Parliamentary Assembly, which deals with relations with Armenia, Azerbaijan, Georgia, Moldova and Ukraine.

[10] Living in the Wendland region which became known nationwide for the Gorleben atomic waste site, Harms is a declared opponent of nuclear power.

"[12] After German newsmagazine Der Spiegel reported in 2013 that American intelligence agencies had monitored the offices of the European Union in New York and Washington,[13] Harms called for a special committee to investigate the claims and the possible cancellation of existing agreements between the European Union and the United States concerning bank transaction information and airline passenger data.

[16] In the context of European efforts to unify their political response to Russia's annexation of Crimea in 2014, Harms claimed that “in the face of a new threat of war in Europe, EU states have indeed agreed on a joint strategy towards Russia.”[17] In April 2015, Harms therefore sharply criticized Prime Minister Alexis Tsipras of Greece for threatening to break ranks on the EU sanctions against Russia over the Russo-Ukrainian war, calling his visit to President Vladimir Putin “clearly pro-Russian and anti-European.“[18] Harms was a member of the parliament's monitoring mission during the Ukrainian parliamentary elections in 2014, led by Andrej Plenković.

[19] On 25 September 2014 Harms, who had arrived in Moscow to witness the court trial against Nadiya Savchenko, was denied entrance to the Russian Federation and was announced as persona non grata.

[21] In 2015, news media reported that Harms was indeed included in a Russian blacklist of prominent people from the European Union who are not allowed to enter the country.

"[25] Along with other senior MEPs from the European Parliament's main groups – including Elmar Brok and Guy Verhofstadt –, Harms signed a 2016 letter to EU foreign relations chief Federica Mogherini in which they urge the EU to impose sanctions on Russian officials over the killing of anti-corruption activist Sergei Magnitsky.