The Flaming Lips [ tickets ], moe. and Los Lobos [ tickets ] are among the acts who will perform in Washington, DC, this weekend as part of a three-day event that will mark Earth Day.

The free event---set for Sunday (4/19) and dubbed "Earth Day on the National Mall"---will also feature performances from DJ Spooky, the Howard University Drummers and Urban Impact, the Joy of Motion Dance Center's teen hip-hop company, according to a press release.

Comedian Chevy Chase will preside over the festivities, and appearances are also planned from a number of speakers, including actor Matthew Modine and US Congressman Edward Markey.

Fans who can't attend the concert in person can catch a live stream of the event at EarthDayTV.net.

Event co-producers Green Apple Festival and the Earth Day Network describe Earth Day on the National Mall as the "flagship event in a coordinated country-wide undertaking" set for Earth Day weekend (4/17-4/19), during which volunteer opportunities and musical performances are also planned in New York City, Boston, Atlanta, Chicago, Denver, Los Angeles, San Francisco, Seattle and Austin, TX.

Volunteers in cities outside of Washington, DC, will be treated to "Thank You Concerts" at indoor venues where popular artists will be performing "with friends" as follows: Soulive & Friends at the Paradise Rock Club in Boston; Cracker & Friends at The Metro in Chicago; Ivan Neville's Dumpstaphunk & Friends at Cervante's Masterpiece in Denver; Cary Brothers & Friends at the Roxy in West Hollywood, CA; Deep Banana Blackout featuring Fred Wesley & Friends at the Bowery Ballroom in New York City; BassNectar & Friends at Slim's in San Francisco; The Blue Scholars & Friends at The Crocodile in Seattle; and Travis Tritt & Friends at Antone's in Austin, TX.

Information about volunteer opportunities, as well as details on events taking place in each of the aforementioned cities, is available at Green Apple Festival's website.