From the Google info page:
Earth Hour invites one billion people in more than 2800 cities representing 83 countries to turn off their lights for one hour – tonight, Saturday, March 28 from 8:30pm to 9:30pm in their local time zone. On this day, cities around the world, including Paris, Sydney, London, Cairo, New York, Los Angeles and Cape Town, will join together to demonstrate their commitment to energy conservation and sustainability. [...] Earth Hour is about more than dimming lights for sixty minutes; it’s about making a commitment to reduce energy consumption throughout the year.
It saddens me that some people have made Earth Hour a political issue and think we’re just a bunch of liberals who don’t know better. It saddens me that some people don’t understand what this is really about. It saddens me that some people don’t see climate change is real, and it doesn’t matter if it’s caused by humans or because earth goes through cycles. We all are suffering the consequences, we all need to do something about it.
So tonight I’m turning my lights OFF, just for one hour. Because it DOES make a difference. We all need to stop for a minute and think that this is not about political ideas or who’s right or wrong, but about what means we use to protect this planet that was given to us.
Vote Earth. Switch your lights off, tonight at 8:30.