It's not a difficult thing to do, if you're prepared!
World Wildlife Fund (WWF) Earth Hour initiative.
This Saturday (27 March) the WWF is encouraging a billion people all over the World to turn off their lights for an hour from 8:30pm. Last year approximately 13 million people in the UK were involved and the lights of many famous landmarks (including Big Ben and Piccadilly Circus) were switched off.
If you would like further information please visit http://earthhour.wwf.org.uk/
