UN marks World Oceans Day

Tourists look at pictures on display during an exhibition on ocean-related subjects, at the UN headquarters in New York, the United States, on June 10, 2013. In observance of World Oceans Day, experts highlighted the impact of climate change and degradation of the marine environment at the UN headquarters on Monday, in an effort to raise global awareness of the challenges faced by the international community in connection with the oceans. (Xinhua/Niu Xiaolei)