Juergen Trittin poses with Martin Kaiser, head of Greenpeace climate politics, during a protest against nuclear power as Germany shuts down its last three nuclear power plants in Berlin, Germany, April 15, 2023. REUTERS/Nadja Wohlleben 

Juergen Trittin poses with a Greenpeace activist during a protest against nuclear power as Germany shuts down its last three nuclear power plants in Berlin, Germany, April 15, 2023. REUTERS/Nadja Wohlleben 

Supporters of the Greens party and Juergen Trittin wait for first projections for the Lower Saxony state election in Hanover, Germany, October 9, 2022. REUTERS/Leon Kuegeler 

Juergen Trittin of the German Green Party speaks with designated German Foreign Minister Annalena Baerbock during a session of the German lower house of parliament Bundestag to elect a new chancellor, in Berlin, Germany, December 8, 2021. REUTERS/Annegret Hilse 

Juergen Trittin and other politicians of the German Green Party pose for media with Hong Kong activists Ray Wong and Alan Li at a party event in the German Parliament to mark the 30th anniversary of the Tiananmen Massacre in Berlin, Germany, June 4, 2019. REUTERS/Hannibal Hanschke 

Juergen Trittin and other politicians of the German Green Party pose for media with Hong Kong activists Ray Wong and Alan Li at a party event in the German Parliament to mark the 30th anniversary of the Tiananmen Massacre in Berlin, Germany, June 4, 2019. REUTERS/Hannibal Hanschke 

Juergen Trittin of the German Green Party welcomes Hong Kong activists Ray Wong and Alan Li at a party event in the German Parliament to mark the 30th anniversary of the Tiananmen Massacre in Berlin, Germany, June 4, 2019. REUTERS/Hannibal Hanschke 

Juergen Trittin of the German Green Party welcomes Hong Kong activists Ray Wong and Alan Li at a party event in the German Parliament to mark the 30th anniversary of the Tiananmen Massacre in Berlin, Germany, June 4, 2019. REUTERS/Hannibal Hanschke 

Juergen Trittin of the German Green Party welcomes Hong Kong activists Ray Wong and Alan Li at a party event in the German Parliament to mark the 30th anniversary of the Tiananmen Massacre in Berlin, Germany, June 4, 2019. REUTERS/Hannibal Hanschke 

Juergen Trittin of the German Green Party is seen inside the Baden-Wuerttemberg State Representation office during exploratory talks about forming a new coalition government in Berlin, Germany, November 19, 2017. REUTERS/Axel Schmidt 

Juergen Trittin and Anton Hofreiter of the German Green Party are seen inside the Baden-Wuerttemberg State Representation office during exploratory talks about forming a new coalition government in Berlin, Germany, November 19, 2017. REUTERS/Axel Schmidt 

Juergen Trittin of the German Green Party arrives at the Baden-Weurttemberg State Representation office for exploratory talks about forming a new coalition government in Berlin, Germany, November 19, 2017. REUTERS/Axel Schmidt 

Juergen Trittin (R) of the German environmental Green Party (Die Gruenen) takes part in a protest rally prior to the G7 summit, in Munich, Germany June 3, 2015. The Group of Seven (G7) two-day summit, being held at Elmau palace in Bavaria, begins on Sunday. REUTERS/Wolfgang Rattay

Juergen Trittin (C) of the German environmental Green Party (Die Gruenen) takes part in a protest rally prior to the G7 summit, in Munich, Germany June 3, 2015. The Group of Seven (G7) two-day summit, being held at Elmau palace in Bavaria, begins on Sunday. REUTERS/Michael Dalder (GERMANY - Tags: POLITICS CIVIL UNREST)

Juergen Trittin of the environmental Green Party (Die Gruenen) addresses a party meeting in Berlin October 18, 2013. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS) 

Juergen Trittin of the environmental Green Party (Die Gruenen) addresses a party meeting in Berlin October 18, 2013. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS) 

Juergen Trittin of the environmental Green Party (Die Gruenen) receives flowers from Katrin Goering-Eckardt during a party meeting in Berlin October 18, 2013. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS) 

Claudia Roth of the environmental Green Party (Die Gruenen) (L) talks to party member Juergen Trittin during a party meeting in Berlin October 18, 2013. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS) 

Juergen Trittin of the environmental Greens party (Die Gruenen) and his party fellow Claudia Roth look out of a window during a break in preliminary coalition talks with Germany's conservative (CDU/CSU) parties at the Parliamentary Society in Berlin October 15, 2013. German Chancellor Angela Merkel needs to find a partner for her third term after she won September's election but fell short of an absolute majority. She meets the Greens for a second round of talks on Tuesday but is more likely to team up with the Social Democrats (SPD) who came second. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS) 

Juergen Trittin of the environmental Greens party (Die Gruenen) and his party fellow Claudia Roth look out of a window during a break in preliminary coalition talks with Germany's conservative (CDU/CSU) parties at the Parliamentary Society in Berlin October 15, 2013. German Chancellor Angela Merkel needs to find a partner for her third term after she won September's election but fell short of an absolute majority. She meets the Greens for a second round of talks on Tuesday but is more likely to team up with the Social Democrats (SPD) who came second. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS TPX IMAGES OF THE DAY) 

Leading Green Party (Die Gruenen) members Katrin Goering-Eckardt (L-R), Juergen Trittin and Renate Kuenast listen to an unidentified party fellow (2nd R) before a party leaders meeting in Berlin September 27, 2013. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS) 

Leading Green Party (Die Gruenen) member Juergen Trittin (L) talks to party fellow Baerbel Hoehn before a party leaders meeting in Berlin September 27, 2013. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS) 

Leading Green Party (Die Gruenen) member Juergen Trittin attends the first parliamentary faction meeting after the country's general election in Berlin, September 24, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS) 

Leading Green Party (Die Gruenen) members Juergen Trittin (R) and Renate Kuenast attend the first parliamentary faction meeting after the country's general election in Berlin, September 24, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS) 

Leading Green Party (Die Gruenen) member Juergen Trittin attends the first parliamentary faction meeting after the country's general election in Berlin, September 24, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS) 

The leaders of the Green Party (Die Gruenen) Claudia Roth (L) and Cem Oezdemir (2nd L) and the party's top-candidates Katrin Goering-Eckardt (2nd R) and Juergen Trittin speak during a news conference after yesterday's general election in Berlin, September 23, 2013. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

The leaders of the Green Party (Die Gruenen) Claudia Roth (L) and Cem Oezdemir (2nd L) and the party's top-candidates Katrin Goering-Eckardt (2nd R) and Juergen Trittin speak during a news conference after yesterday's general election in Berlin, September 23, 2013. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

The leaders of the Green Party (Die Gruenen) Claudia Roth (L) and Cem Oezdemir (2nd L) and the party's top-candidates Katrin Goering-Eckardt (2nd R) and Juergen Trittin speak during a news conference after yesterday's general election in Berlin, September 23, 2013. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

The leaders of the Green Party (Die Gruenen) Claudia Roth (L) and Cem Oezdemir (2nd L) and the party's top-candidates Katrin Goering-Eckardt (2nd R) and Juergen Trittin speak during a news conference after yesterday's general election in Berlin, September 23, 2013. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

The top-candidate of the Greens Party (Die Gruenen) Juergen Trittin attends a meeting of party leaders in Berlin September 23, 2013, the day after the German general election. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS HEADSHOT) 

The top-candidates of the Green Party (Die Gruenen) Katrin Goering-Eckardt (L) and Juergen Trittin attend a meeting of party leaders in Berlin September 23, 2013, the day after the German general election. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS TPX IMAGES OF THE DAY) 

The top-candidate of the Greens Party (Die Gruenen) Juergen Trittin attends a meeting of party leaders in Berlin September 23, 2013, the day after the German general election. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS HEADSHOT) 

The top-candidates of the Green Party (Die Gruenen) Katrin Goering-Eckardt (L) and Juergen Trittin attend a meeting of party leaders in Berlin September 23, 2013, the day after the German general election. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

The top-candidate of the Green Party (Die Gruenen) Juergen Trittin speaks to reporters in Berlin September 23, 2013, the day after the German general election. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

The top-candidate of the Green Party (Die Gruenen) Juergen Trittin speaks to reporters in Berlin September 23, 2013, the day after the German general election. German Chancellor Angela Merkel faces the daunting prospect of persuading her centre-left rivals to keep her in power after her conservatives notched up their best election result in more than two decades but fell short of an absolute majority. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Die Linke top candidate Bernd Riexinger, Social Democratic Party (SPD) top candidate Peer Steinbrueck, Christian Social Union (CSU) Bundestag faction leader Gerda Hasselfeldt, Christian Democratic Union (CDU) party leader and German Chancellor Angela Merkel and Greens (Die Gruenen) top candidate Juergen Trittin (L-R) pose after a TV discussion regarding the German general election (Bundestagswahl) results, at the ZDF studios in Berlin September 22, 2013. REUTERS/Ina Fassbender (GERMANY - Tags: POLITICS ELECTIONS)

Social Democratic Party (SPD) top candidate Peer Steinbrueck, Greens (Die Gruenen) top candidate Juergen Trittin and Die Linke top candidate Bernd Riexinger (L-R) wait for the start of a TV discussion regarding the German general election (Bundestagswahl) results, at the ZDF studios in Berlin September 22, 2013. REUTERS/Ina Fassbender (GERMANY - Tags: POLITICS ELECTIONS MEDIA)

Social Democratic Party (SPD) top candidate Peer Steinbrueck and Greens (Die Gruenen) top candidate Juergen Trittin (R) wait for the start of a TV discussion regarding the German general election (Bundestagswahl) results, at the ZDF studios in Berlin September 22, 2013. REUTERS/Ina Fassbender (GERMANY - Tags: POLITICS ELECTIONS)

Christian Social Union (CSU) Bundestag fraction leader Gerda Hasselfeldt, Christian Democratic Union (CDU) party leader and German Chancellor Angela Merkel, TV hosts, editors in chief of ZDF Peter Frey and ARD Thomas Baumann, Social Democratic Party (SPD) top candidate Peer Steinbrueck, Greens (Die Gruenen) top candidate Juergen Trittin and Die Linke top candidate Bernd Riexinger (L-R) wait for the start of a TV discussion regarding the German general election (Bundestagswahl) results, at the ZDF studios in Berlin September 22, 2013. REUTERS/Ina Fassbender (GERMANY - Tags: POLITICS ELECTIONS MEDIA)

Juergen Trittin (L) and Katrin Goering-Eckardt, the top-candidates of the Green Party (Die Gruenen) in the upcoming general election, clap during an election campaign event in Berlin September 20, 2013. German voters take to the polls in a general election on September 22. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Juergen Trittin, the top-candidate of the Green Party (Die Gruenen), speaks during an election campaign event in Berlin September 20, 2013. German voters take to the polls in a general election on September 22. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Juergen Trittin, the top-candidate of the Green Party (Die Gruenen), speaks during an election campaign event in Berlin September 20, 2013. German voters take to the polls in a general election on September 22. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Juergen Trittin, the top-candidate of the Green Party (Die Gruenen), gestures during an election campaign event in Berlin September 20, 2013. German voters take to the polls in a general election on September 22. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Juergen Trittin, the top-candidate of the Green Party (Die Gruenen), speaks during an election campaign event in Berlin September 20, 2013. German voters take to the polls in a general election on September 22. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

A combination of file pictures shows (L-R, top row) Leader of the Social Democratic Party (SPD) Sigmar Gabriel, German Finance Minister Wolfgang Schaeuble, SPD top candidate Peer Steinbrueck and (L-R, bottom) top candidate of the Green Party (Die Gruenen) Juergen Trittin, Executive Board Member of the European Central Bank (ECB) Joerg Asmussen and SPD parliamentary floor leader Frank-Walter Steinmeier. After Chancellor Angela Merkel and European Central Bank President Mario Draghi, German Finance Minister Wolfgang Schaeuble has wielded perhaps the most influence during Europe's debt crisis. He seems certain to keep his job if Merkel is able to continue her coalition with the Free Democrats (FDP) after a German general election on Sunday, people close to Merkel say. But should she fall short of a centre-right majority, it is unclear whether Schaeuble will be able to stay on, or who might take his place. TO GO WITH STORY GERMANY-ELECTION/FINANCEMINISTER REUTERS/Staff/Files (GERMANY - Tags: POLITICS ELECTIONS BUSINESS) 

A women takes pictures beside election campaign posters of the Social Democratic Party (SPD) Peer Steinbrueck (L) and Katrin Goering-Eckardt (C) and Juergen Trittin of the Green Party (Die Gruenen) in Berlin September 19, 2013. The posters read, "It"s we who decide", "Go and vote" (L) and "We think: Germany is sustainable and you?" German voters will take to the polls in a general election on September 22. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS ELECTIONS) 

A combination of file photos of top candidates in the upcoming German general election German Chancellor and head of the Christian Democratic Union (CDU) Angela Merkel; Peer Steinbrueck of the Social Democrat (SPD); Rainer Bruederle of the Free Democratic Party (FDP); Juergen Trittin of the Green Party (Die Gruenen)and Katrin Goering-Eckardt of the Green Party (Die Gruenen). With her conservatives far ahead in opinion polls, Germany's Angela Merkel is expected to remain chancellor after a federal election on September 22, 2013. But in all likelihood, she will need to form a coalition with another party in order to extend her rule. Merkel would like four more years in a centre-right coalition with the business-friendly Free Democrats (FDP) but recent polls suggest a 'grand coalition' with the Social Democrats (SPD), like her first government from 2005-2009, is more likely. REUTERS/STAFF/files (GERMANY - Tags: POLITICS ELECTIONS) 

The top-candidates of the Green Party (Die Gruenen) in the upcoming general election Juergen Trittin (R) and Katrin Goering-Eckardt talks during a news conference after the Bavaria state election in Berlin, September 16, 2013. German voters take to the polls in a general election on September 22. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Top candidate of the Green Party (Die Gruenen) Juergen Trittin talks during a news conference in Berlin, September 16, 2013. Angela Merkel's allies swept to victory in a state election in Bavaria on Sunday, regaining the absolute assembly majority they lost in 2008 and providing a show of conservative strength for the chancellor a week before Germany goes to the polls. The writing reads: "And now you?" REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS HEADSHOT) 

Top candidate of the Green Party (Die Gruenen) Juergen Trittin talks during a news conference in Berlin, September 16, 2013. Angela Merkel's allies swept to victory in a state election in Bavaria on Sunday, regaining the absolute assembly majority they lost in 2008 and providing a show of conservative strength for the chancellor a week before Germany goes to the polls. The writing reads: "And now you?" REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS HEADSHOT) 

Top candidate of the Green Party (Die Gruenen) Juergen Trittin talks during a news conference in Berlin, September 16, 2013. Angela Merkel's allies swept to victory in a state election in Bavaria on Sunday, regaining the absolute assembly majority they lost in 2008 and providing a show of conservative strength for the chancellor a week before Germany goes to the polls. The writing reads: "And now you?" REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Top candidate of the Green Party (Die Gruenen) Juergen Trittin talks during a news conference in Berlin, September 16, 2013. Angela Merkel's allies swept to victory in a state election in Bavaria on Sunday, regaining the absolute assembly majority they lost in 2008 and providing a show of conservative strength for the chancellor a week before Germany goes to the polls. The writing reads: "And now you?" REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Top candidate of the Green Party (Die Gruenen) Juergen Trittin talks during a news conference in Berlin, September 16, 2013. Angela Merkel's allies swept to victory in a state election in Bavaria on Sunday, regaining the absolute assembly majority they lost in 2008 and providing a show of conservative strength for the chancellor a week before Germany goes to the polls. The writing reads: "And now you?" REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Top candidate of the Green Party (Die Gruenen) Juergen Trittin gestures during a news conference in Berlin, September 16, 2013. Angela Merkel's allies swept to victory in a state election in Bavaria on Sunday, regaining the absolute assembly majority they lost in 2008 and providing a show of conservative strength for the chancellor a week before Germany goes to the polls. The writing reads: "And now you?" REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS TPX IMAGES OF THE DAY) 

Protestors hold posters with the picture of German Chancellor Angela Merkel, SPD candidate Peer Steinbrueck, and Green Party leader Juergen Trittin as they demonstrate against a CDU election campaign rally at Roemerberg square in Frankfurt August 30, 2013. Merkel is seeking a third term in a parliamentary election on September 22. The slogan reads "Their agenda destroys Europe" REUTERS/Kai Pfaffenbach (GERMANY - Tags: POLITICS ELECTIONS)

Protestors hold posters with the picture of German Chancellor Angela Merkel, SPD candidate Peer Steinbrueck, and Green Party leader Juergen Trittin as they demonstrate against a CDU election campaign rally at Roemerberg square in Frankfurt August 30, 2013. Merkel is seeking a third term in a parliamentary election on September 22. The slogan reads "Their agenda destroys Europe" REUTERS/Kai Pfaffenbach (GERMANY - Tags: POLITICS ELECTIONS)

Candidates in the upcoming German general election, the Green Party's (Die Gruenen) Juergen Trittin (R) and Katrin Goering-Eckardt, deliver media statements before the official start of their election campaign in Berlin, August 12, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Candidates in the upcoming German general election, the Green Party's (Die Gruenen) Juergen Trittin (R) and Katrin Goering-Eckardt, deliver media statements before the official start of their election campaign in Berlin, August 12, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

Candidates in the upcoming German general election, the Green Party's (Die Gruenen) Juergen Trittin (R) and Katrin Goering-Eckardt, deliver media statements before the official start of their election campaign in Berlin, August 12, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS) 

A candidate in the upcoming German general election, the Green Party's (Die Gruenen) Juergen Trittin, sits in his van before the official start of his campaign tour in Berlin, August 12, 2013. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS ELECTIONS)