The group Arlingtonians for a Clean Environment is asking for volunteers to help keep the green in St. Patrick’s Day. Well, not exactly the Irish green — but the environmental green.

On March 17, ACE is holding its third annual Green Living Expo from 10:00 a.m. to 4:00 p.m. at Washington-Lee High School. The event focuses on helping residents find practical ways to “green up” their lifestyles. Visitors will find green living seminars, a variety of local and national exhibitors, children’s activities, a raffle, sustainable eating food sales and cooking demonstrations.

The expo is free and open to the public, but the event is still short on volunteers. Extra help is needed from 7:30 a.m. to 5:30 p.m., organizers say. Anyone who wants to lend a hand can get more information by calling 703-228-6427.