Next week is Tu B'Shevat, the Jewish birthday for trees. The meaning of the holiday has undergone some major evolution over the years; it started as a tax deadline, was co-opted by Kabbalists and then the Zionists, and is now considered a holiday celebrating the environment and environmental activism in a broad sense. At the Jewish Women's Archive, our Tu B'Shevat tradition is to seek out and celebrate Jewish women who have dedicated their lives to environmental activism.