The Greens (Die Gruene) have been consistently ranked third in opinion polls in recent months ahead of the German general election.
Led by Juergen Trittin, a former environment minister, and Katrin Goering-Eckardt, the surprise winner of the party's primaries, the party is eyeing a red-green coalition with the Socialists.
Here are some important facts about the candidate:
Juergen Trittin - Co-leader of the Green's parliamentary group alongside Katrin Goering-Eckardt.
- 1980: Joined the Greens
- 1998-2005: Environment minister
More top news
Following Theresa May's announcement of her plans for Brexit, how have newspapers across Europe and the UK reacted?
At least four people have been killed after gunmen opened fire at government offices in the Mexican beach resort of Cancun.
The mobile phone provider was fined by Ofcom after overcharging around 40,000 customers nearly £250,000 over calling "150."