The creation of Earth Day on April 22, 1970 marked what many consider to be the birth of the environmental movement. Today it is regarded as the largest civic event in the world. This year's theme: "It's Our Turn to Lead", is one that Marin residents have embraced since the first Earth Day celebrations. Let's keep up the good work, Marin! Join us to clean-up and restore Bothin Marsh, Corte Madera Creek, Hal Brown Park, or Ring Mountain. Visit the website for a complete list of activities.