Earth Hour moving across world

Earth Hour, a global environmental initiative to get people thinking about climate change, saw people turning off the lights all over the world for an hour on Saturday evening.

It takes place from 8:30 p.m. to 9:30 p.m. local time all over the world.

The World Wildlife Fund said more than a billion people in 100 countries are expected to participate.

Greece and China turned off the lights on famous monuments. European cities went dark as citizens turned off house lights.

In Canada, Jennifer Anne Temple posted on the WWF blog that she and her husband will use a “crank up” table lamp, a “crank up” radio, and use head lamps when moving around the house.

"We just pour a couple of glasses while listening to jazz radio. It may be the best quality time hubby and I share all year, just chatting and music," she wrote.

Earth Hour began in 2007 in Sydney, Australia.