March 28th is Earth Hour, where people all around the world turn off their lights for an hour.
You can sign up at their web site to pledge to go in the dark from 8:30-9:30 on the 28th. They are calling it a vote for our Earth when you switch the lights off. If you leave the lights on, that's a vote for Global Warming.
I saw on cnn.com where their ireporters are telling what they will do during that hour. You could tell jokes to family members, go for a walk, sit outside and look at stars, eat a candlelight dinner, read by flashlight, sit in zen-like state, whatever you can think of with the lights off.
It will be interesting to see how much power the world saves from just an hour a person.
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