Do you want to show you care about energy conservation?
Simply switch off your lights on March 28 from 8:30 to 9:30 p.m., local time.
This is Earth Hour, and Saturday is the third annual worldwide event. Earth Hour is both a symbolic act and the start of a practical habit.

At the same time, Earth Hour reminds each of us how easy it is to conserve -- just turn off non-essential lights and electronics to reduce our own power consumption.