24 cities across the globe cut the power for one hour.

This article is about 24 cities across the globe that have agreed to participate in this years Earth hour. They are all going to shut off all power and electricity for one hour starting at 8 pm. I think that this is an awesome idea and that more cities should join in. The only thing is that they should either do it for longer or more than just one stupid time in a year. What is one hour going to do out of a whole year. I know other cities would follow this example bu they should do it more often. What do you think?
http://www.iht.com/articles/ap/2008/02/19/asia/AS-GEN-Australia-Lights-Out-Campaign.php