China Daily: Climate change will trigger a drop in China’s grain harvest over the next few decades and threaten food security, a leading agriculturalist warns. Tang Huajun, deputy dean of the Chinese Academy of Agricultural Sciences (CAAS), said a 5 to 10 percent crop loss is foreseeable by 2030 if climate change continues. “The impact of climate change, coupled with arable land loss and water shortages, will cause a bigger grain production fluctuation and pose a threat to reaching output targets,” Tang…