China launches Earth Hour campaign 2015 (4/4)
2015-03-29 11:20
Xinhua
Editor:Si Huan
The combination photo shows the Erqi Tower with its lights on (bottom) on March 23, 2013 and off (up) on March 28, 2015 during the annual Earth Hour campaign in Zhengzhou, capital of central China's Henan Province. (Xinhua/Li Bo)
