Broom Service, a small group of volunteers from the San Geronimo Valley, meets every Thursday to clear pernicious invasives like French broom from private and public lands.   Silas Valentino

Marin County has about 750 acres of French broom—a widespread and challenging invasive plant that broadcasts untold numbers of seeds a year—and in the San Geronimo Valley, a volunteer group meets weekly to battle the spread. The members of Broom Service, formerly called the Extractigators, have met nearly every Thursday, weather permitting, for the last five years . . .

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