Bodog Beat

The 'Bird Nest' National Stadium was darkened for one hour to mark Earth Hour in Beijing, China. (AP Images)

So if you're planning to spend one full hour in the dark tonight, good for you. You vote Earth! Tonight, at 8:30 p.m. millions of people across the globe will turn out their lights to raise awareness that we need to put an end to global warming.

Earth Hour is an initiative supported by the World Wildlife Fund, with actor Edward Norton as their spokesman.

And even if your Earth Hour hasn't yet begun, many people in different time zones have already switched off. In Australia, floodlights of the Sydney Opera House were turned off as the city's iconic harbor began events for Earth Hour. Sydney became the birthplace of the Earth Hour campaign in 2007 when 2.2 million turned off their lights, gaining world-wide publicity and igniting a movement that has spread across the world.

How much electricity consumption does Earth Hour save? Toronto alone saved 2,347,600 kilowatts from participating in Earth Hour last year. But it doesn’t matter as the whole point of the initiative is to get people thinking about energy conservation.