A scaled replica of the "Rubber Duck" by Dutch conceptual artist Florentijn Hofman is seen along a street next to a vendor waiting for customers in Shanghai, June 13, 2013. [Photo/Agencies]

A line of fire runs across the field as farmers burn wheat stubble in Shangqiu, Henan province, June 14, 2013. Despite the government ban, farmers in 皇冠体育app often burn crop stalks left after the harvest to clear the fields for the next planting. In 2008, the Chinese government also warned farmers not to burn crop stubble in an effort to improve air quality in and around Olympic host cities.[Photo/Xinhua]