Then enjoy more eco-friendly Earth Week events over the weekend:

>> Pasadena’s Greening the Earth Day Festival (PDF) will feature entertainment from local bands, an interactive drum circle, dancers, children’s activities, educational info about the city’s greening efforts, eco-friendly vendors, and a guided bike tour of the city’s green facilities and projects organized by C.I.C.L.E. The free event happens Sat., April 24, from 10 am to 4 pm at Memorial Park, Armory Center for the Arts, and on Raymond Avenue between Walnut and Holly streets.

>> Sign up for the Fight For Air Climb and challenge yourself to climbing Aon Center’s 63 flights of stairs — and raising funds to benefit the American Lung Association. The climb begins Sat., April 24 at 9 am — though climbers will begin at staggered times. Cost: $25 registration — plus a pledge to raise at least $100.

>> Get your hands dirty at Treepeople’s Coldwater Canyon Park Volunteer Work Day/Earth Day and enjoy free music and food while volunteering. The cleanup happens Sat., April 24 from 9 am to noon. RSVPs are required as the cleanup might get full!

>> The FREE Whole Children Whole Planet Expo 2010 will celebrate Earth Day with free workshops about sustainable living practices, non-toxic products, organic foods, yoga and more at an all-ages event. Be there on April 24 from 9:30 am – 6 pm at Highland Hall Waldorf School in Northridge.

>> Guerilla gardners who love music and the Metro are invited to Rock ‘N Crawl, an all-afternoon event that lets you greenify the area around Metro red line stops while listening to great local bands. Grab your gardening tools to start digging on April 24 at 1 pm at the Universal City Metro Station, then get on the train to ride down to more digs all afternoon! The after party happens at 7 pm at Bar 107. Cost: $15 online or $20 on the day — which gets you a reusable water bottle filled with a thirst quencher.

>> 93.5′s Devi Dev will host the Global Coolin’ Earth Day Block Party, featuring live performances by Dom Kennedy, El Prez, Overdoz,, Kingpen Slim, Black Cobain. The day-long event, put on by Broccoli City, LAXPaperBoys, and a number of eco-groups, happens Sat., April 24 from 11 am to 8 pm at Margo Studios, 1354 Margo St, downtown Los Angeles. Cost: $5 from 11 am to 2 pm, and $10 from 3 pm to 8 pm for the indoor concert.

>> For eco-art, head over to see ReVisions/10 and EartH. Watch a billboard-sized art piece by Leeann Goya, painted on a recycled vinyl billboard, get unveiled over Eco-LA Gallery at 8 pm, then see the gallery show featuring local artists working in recycled and upcycled media. There’ll also be eco-art demos, music, libations, green accessories for sale, and EartH (Eco Art Helps) an exhibit of art on recycled billboard, created by the youth of Los Angeles. The free event begins April 24 at 7 pm at Eco-LogicalART Gallery, 4829 West Pico Blvd, Los Angeles. Earlier: Eco-LogicalArt turns old billboards into eco-art.

>> Take the 100 Gardens Challenge and pledge to plant your own edible garden during the weekend of April 24 and 25! I took this challenge last year — and I’m proud to say that my year-old chard plants are still going strong (though the basil died really fast and the lettuce barely grew). Help transform L.A. into an edible oasis over just one weekend by planting that garden.

>> Want a unique green gift for Mother’s Day? Stop by the 2nd Annual UNIQUE LA Spring Show to pick from the wares of over 300 hand-selected designers and artists. There’ll be an eco-lounge, free workshops, and lots of shopping. The shoe goes on Sat., April 24 and Sun., April 25 from 11 am – 6 pm on both days at the California Market Center’s Penthouse, 110 East 9th St., Los Angeles. Cost: $10, which includes a free drink and a tote bag.

>> Head over to the Mar Vista Green Garden Showcase and take a self-guided tour on foot or by bike to see 79 pretty, eco-friendly gardens that save water — and money on utility bills. The free event happens on Sun., April 25 and is open to all; a map will be posted closer to date.

>> Celebrate Earth Day with Eco Maya (PDF) by enjoying folkloric dances, music, art, and Oaxacan and Mayan regional food. The event happens Sun., April 25 from noon to 7 pm at the Los Angeles Eco-Village, 117 Bimini Pl., Los Angeles. (via Garcetti’s blog)

>> For kid-friendly green fun, go to STAR ECO Station’s Children’s Earth Day. The FREE event will feature celebrity guests, live performances, rescued exotic wildlife, environmental , eco-friendly giveaways, games with prizes, vegetarian food, and more — with optional $5 STAR ECO Station tours running throughout the day. on Sun., April 25 from 10 am – 4 pm at STAR ECO Station, 10101 Jefferson Blvd. Culver City.

>> Catch 2 free eco-foodie documentary film screenings, thanks to the Whole Foods’ Earth Months film series and challenge, “Let’s Retake Our Plates!” On Sun., April 25, watch No Impact Man at 12:30 pm and Food, Inc. at 2:30pm. Both screenings will take place at Beverly Hills Library, 444 N. Rexford Drive; Beverly Hills.

Image via City of Pasadena and LA Guerrila Gardening

>> Break the Bottled Water Habit‘s a new campaign that asks people to pledge not to drink bottled water anymore. Make the pledge for a chance to win a commuter bike, a trip for two to rapidly melting Glacier National Park, or many other water-related consumer products.

>> No Impact Man‘s begging readers to make the Break the Bottled Water Habit campaign (and his blog post) go viral, as if BtBWH is the best thing since sliced local, organic bread. I’d like to point out that Food & Water Watch’s Take Back the Tap campaign has been asking people to take a similar pledge for a while now; even Brita+Nalgene’s FilterForGood campaign, which I write for, has got a similar pledge page. Can’t these people work together?

>> Calling all creek freaks! Know a river hero — or are one yourself? Enter my fave toothpaste company Tom’s of Maine’s “River Stories” Video Contest for a chance to win not a canoe fit for river rafting, but a Prius fit for — carpool tours of the LA River.

>> Socio-enviro-conscious DJs: Remix Bluesman Joe L. Carter’s song “Mr. Waterman” for a chance to win $400. The contest’s linked to a new documentary film, The Water Front, which focuses around a community of Highland Park, MI residents fighting for their right to their water supply. Deadline: Dec. 16, 2008.

The concert’s part of today’s bike rally and fair, which’ll also feature Ed Begley, Jr and Los Angeles City Council members Wendy Greuel, Eric Garcetti and Tom LaBonge.

Rally starts at 11:30; concert at 12:15. To be part of it, be at the South Lawn of Los Angeles City Hall, 200 N. Spring St. in Downtown Los Angeles a couple hours from now. (via LAist)