Earth Hour 2008 around the world

Celeste Allen, 15, sat on the roof outside a bedroom in her home while observing Earth Hour in Phoenix, Arizona, March 29, 2008. A time exposure helped illuminate the sky.
Celeste Allen, 15, sat on the roof outside a bedroom in her home while observing Earth Hour in Phoenix, Arizona, March 29, 2008. A time exposure helped illuminate the sky.
(Jeff Topping/Reuters)