By Jackie Andrews



Naked bike ride and BP protest

Honor Earth Day and help revitalize the public's interest in the BP oil spill — San Francisco style — by participating in this naked Critical Mass on the one-year anniversary of the environmental tragedy. Wear as little or as much as want on your fixie, roller skates, or unicycle. Whatever your attire or your ride, you'll surely enjoy this leisurely tour of the city. Facebook the event for route information.

4–7 p.m., free

Meet at Justin Herman Plaza

Market and Embarcadero, SF

Facebook: World Naked Bike Ride — San Francisco



Walls that divide

Learn about the "Apartheid Wall" being built to annex land in Palestine and its relation to the U.S. border wall with Mexico. Hear testimonies and information on human rights violations kindled by the construction of these two walls, followed by a Q&A session with SFSU and UC Berkeley resident experts Ramon Grosfoguel, Mira Nabulsi, Niha Masri, and John Davalos.

7:30–10 p.m., free

UC Berkeley

Eshleman Hall, seventh floor, Berk.



On hobos and homelessness

Attend this community forum on homelessness with author and scholar Teresa Gowan, who presents her recently published work, Hobos, Hustlers, and Backsliders. The Homeless Youth Alliance will then share its recent art-project-turned-photo-book, Through Our Eyes: The Cameras Were Disposable But Our Lives Aren't, an evocative and sometimes shocking chronicle of the lives of Haight-Ashbury homeless youth.

7–9 p.m., free

The Booksmith

1644 Haight, SF

(415) 863-8688



Earth Day creek challenge

Step up and help clean our neighborhood creeks, and witness first-hand the alarming amount of trash that end up in our waterways while enjoying a day of community partnership. Sites include an elementary school and Wildcat Creek, both in Richmond, as well as other locations throughout the Bay Area. Contact the Watershed Project for more information and to register.

9 a.m.–12 p.m., free

The Watershed Project

Creek sites in various Bay Area locations

(510) 224-4085



Mark Steel, funny man

Enjoy an evening of comedy and politics with Mark Steel, a London-based comedian and author of the book Vive la Revolution:A Stand-up History of the French Revolution. Duo Pizzicato, jazz musician David Alt, and local DJs will kick out the jams while you mingle, dance and talk politics with like-minded radicals.

7–10 p.m., $5–$25, sliding scale


2183 Mission, SF



Liking it WellDone

Support WellDone, the Half Moon Bay organization working to raise awareness of the global water crisis and provide clean water to communities in need, at this celebration of African villages. The bash features an African-inspired dinner from Radio Africa Kitchen, plus drinks, DJs, special performances, and more.

6–9 p.m., $20

Public Works

161 Erie, SF *

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