Earth Hour

February 15, 2008 7:48:34 PM PST
Millions of people all over the world are invited to take part in a global movement to make a statement about climate change.It's called "Earth Hour."

Chicago has been chosen as the country's flagship city for this event.

It's set for Saturday, March 29. Everyone is asked to turn off the lights for one hour, from 8 to 9 p.m.

The goal is to show each person can make a difference by working together.