The document discusses promoting biodiversity and resilience in urban forests. It recommends three actions: 1) Work for more species diversity in California's urban forests by planting underused native tree species. 2) Learn the trees in your local urban forest and teach others their names and histories to increase environmental awareness. 3) Promote the value of trees by educating others about how trees sequester carbon, reduce energy consumption, cool cities, support wildlife, lower crime rates, and promote human happiness.