Turning off your lights for an hour has turned into an annual event and this year's earth hour is scheduled tomorrow night from 8:30 to 9:30.
Provincial Environment Minister Margaret Ann Blaney tells CHSJ News to take part makes a statement that you care what happens to the environment and want to do something about climate change.
Last year's earth hour in the province saved 18 megawatts of electricity which is the equivalent of 360 thousand lights being switched off.
A record 128 countries and territories turned off the lights last year, making Earth Hour 2010 the world's largest global climate change initiative.
Earth Hour began in 2007 in Sydney, Australia, when more than two million homes and businesses switched off their lights for one hour to draw attention to the challenges facing the world because of global warming.