April 17-19Bright Green Clean Team, a community cleanup project sponsored by Safeway, with local volunteers including Girl Scouts, 9am-5pm Friday, 10am-TBD Saturday, 11am-5pm Sunday, various locations including Venice Beach on Sunday, 562.546.6012.Topanga Earth Days, 10am-sunset, Topanga Community House Fair Grounds, 1440 N. Topanga Canyon Blvd., Topanga, topangaearthday.org.Santa Monica Pier Earth Weekend, presented by Heal The Bay, 11am-6pm, Santa Monica Pier Aquarium, 1600 Ocean Front Walk, healthebay.org.April 20Homesteaders, documentary on urban eco-pioneers Jules Dervaes and his children, with the Dervaes family in person, presented by Cooportunity, 7pm, free, MLK Jr. Auditorium, Santa Monica Main Library, 601 Santa Monica Blvd., 310.458.8600.April 22Free Tire Pressure Checks presented by Edmunds.com, Santa Monica Chamber of Commerce and participating local organizations, at several participating locations including Shell (main location with Edmunds staff), 1802 Cloverfield Blvd.; Santa Monica Ford Lincoln Mercury Subaru, 1230 Santa Monica Blvd.; AVON Rent-A-Car, 2411 Lincoln Blvd.; Stokes Tire Pros, 1117 Santa Monica Blvd.; and Firestone,1817 Lincoln Blvd.,edmunds.com.April 23Mural Dedication and Office Tour of the Household Hazardous Waste Center, presented by the Santa Monica Office of Sustainability and the Environment (OSE) and the Virginia Avenue Park Teen Center, 5-7pm, free, Household Hazardous Waste Center, 2500 Michigan Ave., 310.458.2213.April 25Beeplanet Earthday 2009, spring festival, with music, dancing, arts and crafts, interactive eco-tips, animal awareness, an interactive peace exhibit, a Cool Fuel Roadtrip, a raffle, fresh air, pretty flowers, green grass, and more, 10am-1pm, $10-$25, Temescal Canyon, PP, beeplanet.com/events.April 2612th Annual Los Angeles Children’s Earth Day, with celebrities from Disney and Nickelodeon, including Keke Palmer and Robbie Amell, Jason Earles, Simon Curtis, Chelsea Makela, Ariel Winter, Rodney “Darkchild” Jerkins, and others, 10am-4pm, free, Star Eco Station, 10101 Jefferson Blvd., CC, ecostation.org.