Tonight is Lights Out for Earth Hour!
This event began in Sydney, Australia last year as a way to bring attention to our energy consumption and to the larger issue of global warming. It's grown from a one-city event to a global movement in 2008.
This year, millions will turn out their lights at 8 o'clock in their local time zones to show their support, and awareness, of this worthy cause. Millions of people in countries around the world will go dark tonight.
I had all my lights off and my computer shut down for the hour. I hope you do too.