Tonight millions across the world will be celebrating Earth Hour by turning off the lights starting at 8:30.
The event is usually held every third Saturday in March. It began in Australia in 2007 to draw attention to environmental issues.
Some in Canada though, say earth hour has been losing popularity in recent years.
OLG slots at Georgian Downs will be participating in Earth Hour tonight; where essential lighting for the facility will be dimmed from 8:30-9: 30 pm.