Earth Hour 2007 occurred in Sydney, Australia.
Earth Hour 2008 is a global event.
If every American Household turned off the lights for one hour at 8 p.m. local time on March 29th during the World Wildlife Fund's Earth Hour 2008, they would prevent more than 16,610 tons of carbon dioxide from being released - enough to fill every hot-air balloon at the annual Albuquerque International Balloon Fiesta seven times.
Please use my link to sign up now and join the world in the dark for Earth Hour - 8 p.m. on 29 March 2008 (your local time). It's just one hour!
Sign up here