Earth Hour: Send your comments and pictures

The rest of the world is gearing up to support the World Wide Fund for Nature's (WWF) Earth Hour on Saturday.

Thousands of people from around the world are expected to join the event by switching off all non-essential lights for one hour at 8pm.

Will you be taking part in Earth Hour by switching off your lights? Or do you think it is all a waste of time? Do we do enough to conserve energy? Let us know by filling in the form below.

If you participate, how will you mark the occasion? If you're holding a candle light party, or if you take a great picture of Earth Hour - inside or outside, then click here to upload your photographs of the event.