File photo of farmers picking watermelons inside a plastic tent at a flooded field in Kaihua county

 
File photo of farmers picking watermelons inside a plastic tent at a flooded field in Kaihua county
Farmers pick watermelons inside a plastic tent at a flooded field in Kaihua county, Zhejiang province in this June 15, 2011 file photo. Global warming threatens China's march to prosperity by cutting crops, shrinking rivers and unleashing more droughts and floods, says the government's latest assessment of climate change, projecting big shifts in how the nation feeds itself. REUTERS/Lang Lang/Files (CHINA - Tags: ENVIRONMENT DISASTER AGRICULTURE)