GreenBuzz Berlin is a non-profit organization that promotes sustainability through various events and by sharing knowledge. It connects over 5,000 people through 55 events featuring 137 speakers and 200 quick pitches. Events include Sustainability Drinks, panels on renewable energy, movie nights and labs. GreenBuzz Berlin also connects people through an online community of 2,900 Facebook followers, 1,800 mailing list subscribers and 600 Meetup members. It shares knowledge through 65 blog posts, 10 publications and lab reports. The volunteer-run organization was founded in 2014 and is part of a larger GreenBuzz network across multiple cities.