Earth Hour marked across the globe

A combination photo of Ion Orchard, one of the largest shopping malls on Orchard Road, before (top) and during Earth Hour in Singapore March 27, 2010 in this combination picture. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 pm local time, is meant as a show of support for tougher action to confront climate change. [Agencies]