Who is the leader of greens?

Please provide more context! "The Greens" can refer to several different political parties or organizations.

To answer your question accurately, please tell me:

* Which country are you asking about? The Green Party is a common name for environmentalist political parties in many countries.

* Are you referring to a specific organization or movement? There are various Green organizations beyond political parties.

Once you provide more information, I can help you identify the leader you are looking for.