Earth Hour, which was celebrated for the third time this past Saturday, is a global event to raise awareness about the planet by collectively turning off the lights. According to the Earth Hour site, the event is a “call to action to every individual, every business and every community throughout the world. It is a call to stand up, to take responsibility, to get involved and lead the way towards a sustainable future.” More importantly, it serves to remind us all of “the one thing we all have in common – our planet.”

With more than 120 countries and millions of people participating, Earth Hour aims to highlight the big impact that can be made by very small changes. Indeed, it was estimated that overall energy usage in Ottawa alone dropped by 6% during the hour, while Nova Scotia reported an 18-megawatt reduction in power consumption – equivalent to more than 1.4 million 13-watt compact florescent light bulbs.

Here are some great before and after images, from Boston.com.

Parliament Hill, dimmed:

Sydney, before:

Sydney, during Earth Hour:

Vegas, before:

Vegas, during Earth Hour:

Did you celebrate Earth Hour? If so, how?

– Jessie W.