World landmarks dimmed for Earth Hour

In this two photo combination picture, showing the landmark India Gate is seen lit, top, and then the same location in darkness when the lights are turned out for one hour to mark Earth Hour, in New Delhi, India, 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/Mustafa Quraishi)