Combination picture shows Yintai Centre buildings before and during Earth Hour, when they turn off the red lights on the tops, in Beijing’s central business district

Combination picture shows Yintai Centre buildings before and during Earth Hour, when they turn off the red lights on the tops, in Beijing’s central business district

Combination picture shows Yintai Centre buildings before (top) and during Earth Hour, when they turn off the red lights on the tops, in Beijing’s central business district, March 28, 2015. Lights around the world are switched off to mark Earth Hour to raise awareness about energy consumption. REUTERS/Kim Kyung-Hoon