This combination of two photos showing Malaysia's landmark Petronas Twin Towers before, top , and after, bottom, being turned off the lights to mark Earth Hour in Kuala Lumpur, Malaysia, Saturday, March 31, 2012. Earth Hour takes place worldwide at 8.30 p.m. local time and is a global call to turn off lights for 60 minutes in a bid to highlight the global climate change. (AP Photo/Lai Seng Sin)