Miranda Kerr is back for the second year running as the Global Ambasssador for Earth Hour. 
 
The "lights out" campaign, which last year featured participation by more than 135 countries and hundreds of millions of people will happen again in Bulgaria.

"73 towns in the ountry are offiialy joining the campaign which is far better than last year's 47." - said Konstantin Ivanov of WWF Bulgaria in our studio earlier today.

We will all switch off the lights at 8:30 pm on Saturday. A special LIGHT parade starts from the palace in front of the National theater in Sofia and will follow the bulevards Ruski and Vitosha up to the national Palace of Culture.