Werbach co-founded the Sierra Student Coalition in high school. The SSC is a student-led national network of environmental activists that grew to 30,000 members under his leadership.
Werbach co-founded the re-use platform Yerdle. Today, Yerdle has more than 900,000 members, and has helped people share over one million items, from dresses to tents.
In 2006 Werbach published a hand-bound, 100 copy edition illustrated book titled Extinction/Adaptation. The book presents humanity's extinctions and adaptations from A to Z.
Working alongside legendary activist Elden Hughes, Werbach led the student lobby effort to pass the California Desert Protection Act, which created Death Valley and Joshua Tree national parks.