- TreePeople launches the Million Tree Campaign. To celebrate, staff and volunteers go to the mountains and plant 7,000 seedlings in one day. In response to The City of Los Angeles Planning Department calling for the planting of a million trees to help Los Angeles comply with the 1970 Clean Air Act. The city estimates that it would require twenty years to plant and 200 million dollars. TreePeople completes the massive undertaking in just three years.