Shut everything off tonight, 8:30pm wherever you are.

It’s Earth Hour. If you can, keep everything off until the next day too. It’s just a couple hours anyway. Go while away the time and ride a bike instead.

WWF Earth Hour Poster

After all, you can always blame the Panda just like KT Tunstall.

Singer KT Tunstall switches off the Christmas lights in Westfield London, in Shepherd's Bush, to launch WWF's Earth Hour 2012.

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