Picture shows Edinburgh Castle before and during lights out as buildings across Scotland participate in WWFâs Earth Hour on March 28, 2009. More than 74 countries signed up to participate in turning off lights for 60 minutes from 8:30 to 9:30 in the evening local time in an effort to raise global awareness on climate change. The campaigns goal is to get 1 billion people switching off their lights as part of a global vote against climate change.
