1 Event ... Earth Hour 2010

Saturday March 27th   
8:30pm to 9:30pm

Participation is pretty easy. By flipping off your light switch on March 27th at 8:30 p.m. local time you will be casting your vote for action on climate change.
 

Earth Hour started in 2007 in Sydney, Australia when 2.2 million homes and businesses turned their lights off for one hour to make their stand against climate change. Only a year later and Earth Hour had become a global sustainability movement with more than 50 million people across 35 countries participating. Global landmarks such as the Sydney Harbour Bridge, the CN Tower in Toronto, Rome’s Coliseum, and our very own Golden Gate Bridge all stood in darkness, as symbols of hope for a cause that grows more urgent by the hour.
 

To be counted in the numbers, go here and register.

On a related note, the following photo shows the world at night. As you can see, we shine the brightest. In this case, not exactly the best thing.