Cities mark Earth Hour -- a single hour of energy conservation.
Sydney, Australia is among world's first city to "go dark":
First cities go dark for Earth Hour - CNN.com
Google's home page is black to mark the event, today, as well.
Google - Earth Hour
Anyone can do this... turn off all your lights from 8 to 9 PM. Light up some candles -- pretend it's a power outage! -- turn on the camp lantern, play some scrabble or Monopoly, look at the stars (if it's not cloudy) or make up stories about the people that lived where you are, thousands of years ago, etc.
Cities mark Earth Hour -- a single hour of energy conservation -- today. 
Sydney, Australia is among world's first city to "go dark":
First cities go dark for Earth Hour - CNN.com
Google's home page is black to mark the event, today, as well.
Google - Earth Hour
Anyone can do this... turn off all your lights from 8 to 9 PM. Light up some candles -- pretend it's a power outage! -- turn on the camp lantern, play some scrabble or Monopoly, look at the stars (if it's not cloudy) or make up stories about the people that lived where you are, thousands of years ago, etc.
YouTube - Earth Hour 2008 vids