China's President Hu Jintao, right, arrives with Sha Zukang, Secretary-General of the Rio+20, left, for the group photo at the United Nations Conference on Sustainable Development, or Rio+20, in Rio ... more 
China's President Hu Jintao, right, arrives with Sha Zukang, Secretary-General of the Rio+20, left, for the group photo at the United Nations Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Wednesday, June 20, 2012. The Earth summit runs through June 22. (AP Photo/Victor R. Caivano) less 
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Associated Press | Photo By Victor R. Caivano
Sat, Jun 23, 2012 3:14 AM EDT