A naked protest against the dependence on fossil fuels by riding bikes across San Francisco was held during the "World Naked Bike Ride" on March 10. According to the organisers, it aims to defend the right of cyclists to ride on the streets in safety.

It also claims to "Celebrate free-body culture, bicycling as an alternative to cars and a generally greener way of living."

This was the 3rd Annual Southern Hemisphere World Naked Bike Ride.

A glimpse at the event.

A naked cyclist holds his bicycle up during the "World Naked Bike Ride" on Sao Paulo's Paulista Avenue March 10, 2012. The event aims to defend the right of cyclists to ride on the streets in safety, according to organisersReuters
Cyclists take part in the "World Naked Bike Ride" on Sao Paulo's Paulista Avenue March 10, 2012. The event aims to defend the right of cyclists to ride on the streets in safety, according to organisers. The word on the woman's back on right reads: " Respect".Reuters
Cyclists take part in the "World Naked Bike Ride" on Sao Paulo's Paulista Avenue March 10, 2012. The event aims to defend the right of cyclists to ride on the streets in safety, according to organisers.Reuters
A cyclist takes part in the "World Naked Bike Ride" on Sao Paulo's Paulista Avenue March 10, 2012. The event aims to defend the right of cyclists to ride on the streets in safety, according to organisers. The word on the cyclist's back reads: " Peace".Reuters