I was at SEA Lab Redondo last week and noticed that they are having a great Earth Day Celebration, including a reusable bag giveaway (for swapping your plastic bags), a beach cleanup, and other fun activities. Here is the info:
Date: April 24, 2010
Time: 10AM - 2PM
Location: The Sea Lab Redondo Beach
1021 N Harbor Dr
Redondo Beach, CA 90277
(310) 318-7458
http://www.yelp.com/biz/the-sea-lab-redondo-beach#hrid:ClF3pH61KDmZGTvENOhAdA
Alternatively, you could always have your own beach cleanup! There is plenty of beach in the South Bay that could use a little TLC :)