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4 of the world’s top 5 tallest buildings will be switching their lights off for Earth Hour.

The Burj Khalifa, the world’s tallest building, stands at over 800m and is championed as a symbol of international cooperation and progress - a perfect match for Earth Hour's ideals! The Burj Khalifa joins the CN Tower, Taipei 101 and Willis (Sears) Tower, with the Petronas Towers as the one omission so far from the top 5 so far.

Time to switch on to switching off

March 27 2010

On this day at 8:30pm you will be able to simply, yet powerfully, demonstrate your Vote for Earth.

What is Earth Hour?

It is the single biggest mass-climate action ever seen.

What does it involve?

Simply turning off your lights for 1 hour. Earth's hour.

There's only days left till that Hour.

Sign up for Earth Hour
Sign up NOW to make sure you get left in the dark!

"What happens if I sign up?"

You get counted.

Why?

Because we want make those who lead our world sit up and take notice. Take notice of you and your concerns. And you don't have to be a green super-hero to do this... you just have to be you, you just have to care, and you just have turn your lights out for 1 hour.

Get the free Earth Hour App for your BlackBerry phone!

There's an Earth Hour near you...

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